Math Curmudgeon

@mathcurmudgeon.bsky.social

666 Followers 459 Following

~40 years teaching HS math, physics & computer science. #iteachmath He/Him/Sir/Mr. M Alaxandr Combat Archer, Northern Army SCA: Society for Creative Aachronism "Þæs ofereode, þisses swa mæg." "That passed; this too shall pass."

Center cards: Area is less than 70 The shape is a pentagon. Player on the left has played "The shape is regular" The next player must choose between The measures of all interior angles are integers Adjacent angles add to 180 Angle Bisectors pass through the opposite vertex. Exterior angles are 30
Release the PEDO-files and Prosecute the PEDOPHILES.
Alternatively, view purchase options below: Purchase 24 hour online access to view and download content. Article - $37.50
Center cards: Area is less than 70 The shape is a pentagon. Player on the left has played "The shape is regular" The next player must choose between The measures of all interior angles are integers Adjacent angles add to 180 Angle Bisectors pass through the opposite vertex. Exterior angles are 30
Two Rectangles Create two rectangles. Here's what we'll need: The perimeter of A is twice as long as the perimeter of B. The area of B is twice as big as the area of A. What are the sides of A and B that will make that work? Whole numbers greater than 0, please.
The triangle is equiangular. The triangle is acute. The triangle is obtuse. The triangle is a right triangle. The triangle is equilateral. The triangle is isosceles. The triangle is scalene. The triangle is a 45-45-90 triangle. The triangle is a 30-60-90 triangle.
Consistency! Consistency! is designed for students who are about halfway through a typical Geometry course. It’s excellent for review and revision because it promotes discussion and argument. GAME PLAY A Round of Play: - The cards are dealt counter-clockwise and any remaining cards are set face down to form a draw pile. Each player gets the number of cards as in the table. - The player to the dealer’s right begins the round by placing any card face-up in the middle of the table. - Each player in turn lays down a card (face-up) that is consistent with all cards already in play: For example: A middle card has the image at right. The next card could be “cos⁡〖A=1/2〗 ” or “one exterior angle is 120° ” but not “Side lengths are Pythagorean triples.” - A player who cannot lay down a consistent card draws 1card and play moves to the right. - Players can bluff and lay down a card that is inconsistent with one or more of the cards already played. Anyone can challenge a card at any time. Allow 30 seconds or so for players to decide whether to challenge.
WODB graphs of parabolas with lines: tangent, intersecting two pts, not intersecting, parabola (a=-1) WODB leaf types: jagged edge, smooth edge, simple compound
"Which one doesn't belong?" display in a school hallway.
5/9x(70-32)=21.111
285 14.8518109 4100 14.8519014 1777 28.5009300 4961 28.5010049 2075 57.7293104 4997 57.7293283 4703 175.8511277 2170 175.8511567 4848 296.0611490 828 296.0612136 4859 305.1067136 661 305.1068079
413 48.43071 295 48.43082 732 99.16957 912 99.17009 156 232.95813 1191 232.95874
Rational Functions Cipher Puzzle v2 Simplify each expression; match to the answers on the other side. 1. (5x+15)/(x^2-x-20)*(2x-10)/(10x^2+50x+60) 2. 4/(x-5)-(4x+7)/((x+2)(x-5)) 3. (4x^3+12x^2)/(x^2+5x)÷(2x^4+10x^3+12x^2)/(x^3+5x^2-4x-20) 4. 3/(x+2)+1/(x+4) 5. 4/(3(x+4))-(x+2)/(x+4)(x+1) +2/(3(x+1)) 6. (x^4-x^2)/(x+5)*(x^2+3x-10)/(x^4-5x^2+4)
view of classroom table with white boards, markers, and a rational functions simplification problem written on a white board.
google image results for "math icons" Includes a picture of Sam.
Adam Kitzinger tweet says that he now has negative four security clearances after Tulsi Gabbard posts that his clearance has been revoked again.
DESMOS screenshot (follow the link in the post) showing how to get points on a curve to translate along with the curve.
Right triangle in a rectangle to show why the angle sum formulas in trigonometry work.
Sources of error in calculus Pie chart - 3 pieces. Integration is about 5% Chain Rule is about 15% Arithmetic is about 80%
The data in the following table list natural gas consumption ( in quadrillion BTU ) in the United States. Estimate the consumption in 1982, 2000, 2010, & 2016. Natural Gas Consumption Year: 1960 1970 1980 1990 1997 Consumption: 12.4 21.8 20.4 19.3 22.6 Source: US Department of Energy A. Enter the data into a table. Use two-digit years. With only the data appearing on your graph, estimate the numbers for 1983, 2000, 2010, and 2016. a. When you estimate, remember that this is real. Why would natural gas consumption change in the way you think it would? B. Find a polynomial function that models the data. a. Desmos, create a table. Enter the values. b. What order function does that data seem to be following? c. Create a regression. d. What is the equation that seems to match the data best? C. Graph the model and the data together. Take a screenshot. a. How good is the match between the model and the data? b. Use your model (equation) to estimate natural gas consumption in 1982. c. Can we feel confident about the 1982 estimate? Explain why or why not.
Cologuard advertisement. Banner says "In a clinical study, 13% of people without cancer received a positive result (false positive) and 8% of people with cancer received a negative result (false negative)
Math problem A rule from geometry says that three points determine a circle. • Make a triangle with the three points. • Find the midpoints of the three sides • Find the slopes of the three sides. • Determine the slopes of the perpendicular lines. • Draw the perpendicular bisectors of the three sides. • The three bisectors meet at the center of a circle. • The points are A( 20, –18 ); B( 8, 18 ); C( –16, –6 ) Verify that the distances from center to each vertex are the same.
Every time you do this: sin^(-1) x =1/sinx Elon Musk tweet: He's the worst, sorry.
Every time you do this: 2*3^2=36 The picture of an otter holding his (her?) paws out "to stop" it, saying "HOLD UP"
Disrespectful bear cub for adding fractions incorectly
Bald Eagle taking off from the corn field on my drive in to work the other day.
Cartoon: Ozymandius statue but the face on the head is Elon Musk, and the inscription reads "so much mighy wow ... mega(?) rich how money"
Time magazine cover with elon musk behind the resolute desk.
Drawing of "Nero commanding his army to stab the sea (Fight Neptune).
DESMOS screen grab of a quartic polynomial and its roots.
Our road, class 4, covered in snow and sorta plowed.
German citizen: You don’t think that was a Nazi salute; come try that in Germany, Elon. I fucking dare you.
Hedgehog cries if you do this mistake. square root(2)/2 = square root
Three sides of a rectangular box have areas of 84 cm^2, 30 cm^2, and 70 cm^2. What are the dimensions of the box?