Matt Enlow
@unsolvedmre.bsky.social
Mathematician, math teacher, math enthusiast, math/art-ist. Universal humanizer.
Pinned
One-to-one functions in Alg II Honors today. That means it's time to share one of my favorite little aphorisms:
If a function's one-to-one,
Then what it does can be undone.
#iTeachMath #MathSky
If a function's one-to-one,
Then what it does can be undone.
#iTeachMath #MathSky
November 12, 2025 at 12:52 PM
One-to-one functions in Alg II Honors today. That means it's time to share one of my favorite little aphorisms:
If a function's one-to-one,
Then what it does can be undone.
#iTeachMath #MathSky
If a function's one-to-one,
Then what it does can be undone.
#iTeachMath #MathSky
If one wanted to, one could probably write a question about pursuit curves set in the "Weapons" universe
November 10, 2025 at 6:05 PM
If one wanted to, one could probably write a question about pursuit curves set in the "Weapons" universe
If you see this and think “augmented Tricsuit,” #YouMightBeAMathematician
November 5, 2025 at 1:39 PM
If you see this and think “augmented Tricsuit,” #YouMightBeAMathematician
It's worth a little more detail: Her teacher had them write a proof, then the next question said something like, "If you used more than 4 steps in the previous proof, could you write a proof using fewer steps than you did?" 😒 [1/4]
After receiving little more than groans and eye rolls when helping my 14yo daughter with her math homework over the years, I finally got it last night after talking her through a Geometry proof: "Why couldn't YOU be my math teacher?"
a baby with a fist in the air on a purple background
ALT: a baby with a fist in the air on a purple background
media.tenor.com
October 28, 2025 at 4:01 PM
It's worth a little more detail: Her teacher had them write a proof, then the next question said something like, "If you used more than 4 steps in the previous proof, could you write a proof using fewer steps than you did?" 😒 [1/4]
After receiving little more than groans and eye rolls when helping my 14yo daughter with her math homework over the years, I finally got it last night after talking her through a Geometry proof: "Why couldn't YOU be my math teacher?"
a baby with a fist in the air on a purple background
ALT: a baby with a fist in the air on a purple background
media.tenor.com
October 28, 2025 at 12:15 PM
After receiving little more than groans and eye rolls when helping my 14yo daughter with her math homework over the years, I finally got it last night after talking her through a Geometry proof: "Why couldn't YOU be my math teacher?"
Reposted by Matt Enlow
On of my geometry students just talked about the Angle Addition Prostitute and I think my day is over.
October 22, 2025 at 2:08 PM
On of my geometry students just talked about the Angle Addition Prostitute and I think my day is over.
I'm just trying to write an email to my wife outlining our schedule for the next couple of weeks.
It looks like I've got at least three different "checkers" telling me I'm doing it wrong. 😑
It looks like I've got at least three different "checkers" telling me I'm doing it wrong. 😑
October 17, 2025 at 12:39 PM
I'm just trying to write an email to my wife outlining our schedule for the next couple of weeks.
It looks like I've got at least three different "checkers" telling me I'm doing it wrong. 😑
It looks like I've got at least three different "checkers" telling me I'm doing it wrong. 😑
I asked ChatGPT a True/False question from Hammack's "Book of Proof," and it did something I hadn't seen it do before.
It first said the statement was true, and then as it explained its "reasoning," it wound up convincing itself that the statement was false (which it is). #MathSky #iTeachMath
It first said the statement was true, and then as it explained its "reasoning," it wound up convincing itself that the statement was false (which it is). #MathSky #iTeachMath
October 17, 2025 at 11:49 AM
I asked ChatGPT a True/False question from Hammack's "Book of Proof," and it did something I hadn't seen it do before.
It first said the statement was true, and then as it explained its "reasoning," it wound up convincing itself that the statement was false (which it is). #MathSky #iTeachMath
It first said the statement was true, and then as it explained its "reasoning," it wound up convincing itself that the statement was false (which it is). #MathSky #iTeachMath
A certain polyhedron has 6 faces and 8 vertices.
Must it have a hexagonal cross-section?
#iTeachMath #math #WonderWithMe
Must it have a hexagonal cross-section?
#iTeachMath #math #WonderWithMe
October 8, 2025 at 1:11 PM
A certain polyhedron has 6 faces and 8 vertices.
Must it have a hexagonal cross-section?
#iTeachMath #math #WonderWithMe
Must it have a hexagonal cross-section?
#iTeachMath #math #WonderWithMe
Oooh, new mathematical quackery just dropped
October 7, 2025 at 4:31 PM
Oooh, new mathematical quackery just dropped
Once every couple of weeks we get an email with the subject "PD Newsletter" making us aware of various PD opportunities available to us.
But when I see it appear in my inbox, my first thought (if you could even call it that) is to respond, "PD Newsletter? What the f___ does THAT mean?"
#iykyk
But when I see it appear in my inbox, my first thought (if you could even call it that) is to respond, "PD Newsletter? What the f___ does THAT mean?"
#iykyk
September 29, 2025 at 11:15 PM
Once every couple of weeks we get an email with the subject "PD Newsletter" making us aware of various PD opportunities available to us.
But when I see it appear in my inbox, my first thought (if you could even call it that) is to respond, "PD Newsletter? What the f___ does THAT mean?"
#iykyk
But when I see it appear in my inbox, my first thought (if you could even call it that) is to respond, "PD Newsletter? What the f___ does THAT mean?"
#iykyk
Consider a regular heptagon with side length 1 unit. Its diagonals have two distinct lengths.
Prove that the sum of those two distinct lengths is equal to their product.
#iTeachMath #MathSky
Prove that the sum of those two distinct lengths is equal to their product.
#iTeachMath #MathSky
September 27, 2025 at 6:44 PM
Consider a regular heptagon with side length 1 unit. Its diagonals have two distinct lengths.
Prove that the sum of those two distinct lengths is equal to their product.
#iTeachMath #MathSky
Prove that the sum of those two distinct lengths is equal to their product.
#iTeachMath #MathSky
My Advanced Topics students are super into this whole "degrees of infinity" thing. They've spent most of two whole class periods wondering and brainstorming. I spent that time trying not to let my knowledge of "the answer" seep out too much in my attempts to help them prime their thinking.
September 27, 2025 at 2:10 PM
My Advanced Topics students are super into this whole "degrees of infinity" thing. They've spent most of two whole class periods wondering and brainstorming. I spent that time trying not to let my knowledge of "the answer" seep out too much in my attempts to help them prime their thinking.
My 14yo daughter asked me to check her work on a Geometry worksheet.
It was some of the most boring and soulless drudgery I've seen. The "We sprinkled some random algebra into repetitive questions about the Angle Addition Postulate and the Segment Addition Postulate. Boom. Geometry" type.
It was some of the most boring and soulless drudgery I've seen. The "We sprinkled some random algebra into repetitive questions about the Angle Addition Postulate and the Segment Addition Postulate. Boom. Geometry" type.
a man says why are you punishing me
ALT: a man says why are you punishing me
media.tenor.com
September 26, 2025 at 11:58 AM
My 14yo daughter asked me to check her work on a Geometry worksheet.
It was some of the most boring and soulless drudgery I've seen. The "We sprinkled some random algebra into repetitive questions about the Angle Addition Postulate and the Segment Addition Postulate. Boom. Geometry" type.
It was some of the most boring and soulless drudgery I've seen. The "We sprinkled some random algebra into repetitive questions about the Angle Addition Postulate and the Segment Addition Postulate. Boom. Geometry" type.
TIL that the phrase "good doobie" came from Romper Room 😮
September 25, 2025 at 5:39 PM
TIL that the phrase "good doobie" came from Romper Room 😮
Beginner's luck?
Connections
Puzzle #837
🟨🟨🟨🟨
🟦🟦🟦🟦
🟩🟩🟩🟩
🟪🟪🟪🟪
Connections
Puzzle #837
🟨🟨🟨🟨
🟦🟦🟦🟦
🟩🟩🟩🟩
🟪🟪🟪🟪
September 25, 2025 at 2:10 PM
Beginner's luck?
Connections
Puzzle #837
🟨🟨🟨🟨
🟦🟦🟦🟦
🟩🟩🟩🟩
🟪🟪🟪🟪
Connections
Puzzle #837
🟨🟨🟨🟨
🟦🟦🟦🟦
🟩🟩🟩🟩
🟪🟪🟪🟪
Introduced Advanced Topics to 𝒫(ℝ²) today. Minds were appropriately blown.
Including my own, when one student referred to the humans in the room as "elements of 𝒫(ℝ³)."
Including my own, when one student referred to the humans in the room as "elements of 𝒫(ℝ³)."
September 24, 2025 at 7:52 PM
Introduced Advanced Topics to 𝒫(ℝ²) today. Minds were appropriately blown.
Including my own, when one student referred to the humans in the room as "elements of 𝒫(ℝ³)."
Including my own, when one student referred to the humans in the room as "elements of 𝒫(ℝ³)."
A student drew this portrait of me on her test today
September 22, 2025 at 7:47 PM
A student drew this portrait of me on her test today
Reminds me of the time my dad texted me "Just got shot" to let me know he'd just gotten his COVID shot 😑
September 17, 2025 at 7:28 PM
Reminds me of the time my dad texted me "Just got shot" to let me know he'd just gotten his COVID shot 😑
Can't wait to get to this bit of Hammack's "Book of Proof" with Advanced Topics 🤯🤯🤯 #iTeachMath
September 15, 2025 at 1:36 PM
Can't wait to get to this bit of Hammack's "Book of Proof" with Advanced Topics 🤯🤯🤯 #iTeachMath
Pretty wild that two-hit wonder The Escape Club’s two hits were “Wild Wild West” and “I’ll Be There.” Just… two completely different songs.
September 10, 2025 at 1:06 AM
Pretty wild that two-hit wonder The Escape Club’s two hits were “Wild Wild West” and “I’ll Be There.” Just… two completely different songs.
A colleague asked if she could decorate a room we both teach in. I said “Sure.”
She made it clear I could veto anything she put up, but I was all, “Nah, whatever’s fine.”
Until…
She made it clear I could veto anything she put up, but I was all, “Nah, whatever’s fine.”
Until…
September 4, 2025 at 7:59 PM
A colleague asked if she could decorate a room we both teach in. I said “Sure.”
She made it clear I could veto anything she put up, but I was all, “Nah, whatever’s fine.”
Until…
She made it clear I could veto anything she put up, but I was all, “Nah, whatever’s fine.”
Until…
One minute I was prepping for classes.
The next minute I found myself on the webpage of a Vermont falconer.
I'm sure there was a linear path I followed to get from the former to the latter, but I'll be darned if I could tell you what it was.
#ADHD
The next minute I found myself on the webpage of a Vermont falconer.
I'm sure there was a linear path I followed to get from the former to the latter, but I'll be darned if I could tell you what it was.
#ADHD
September 1, 2025 at 5:31 PM
One minute I was prepping for classes.
The next minute I found myself on the webpage of a Vermont falconer.
I'm sure there was a linear path I followed to get from the former to the latter, but I'll be darned if I could tell you what it was.
#ADHD
The next minute I found myself on the webpage of a Vermont falconer.
I'm sure there was a linear path I followed to get from the former to the latter, but I'll be darned if I could tell you what it was.
#ADHD
If you’re an authoritarian when your party’s in power and a libertarian when they’re not, I regret to inform you that you are merely an authoritarian
August 31, 2025 at 8:06 PM
If you’re an authoritarian when your party’s in power and a libertarian when they’re not, I regret to inform you that you are merely an authoritarian