Elliptical training machine

トピック:幾何

Yesterday I was at the gym, and asked myself: does the elliptical training machine really trace an ellipse? The answer is: not exactly, and here's a visual proof.

新しい教材

Trefoil Knot
bewijs stelling van Pythagoras
Random Polar Curve (3)
Damped Trochoidal Curve
¿Quién llegará más lejos en el mundial?

教材を発見

Problems from text, Problem 6
GM2-03-P1-ET1 Exploring Nets
Tangent Meets Radius
速率 - 蝸牛運動會: 研習 & 修訂
PR2b-12-CYU1 (Solve Inequality)

トピックを見つける

指数関数
対数関数
平面図形や形
対称性
統計的特性