Interior angles in an equilateral triangle close equilateral triangle A triangle with all three sides of equal lengths. All the angles are 60°. ... Form an equation equal to 360˚.

It categorizes triangles into equilateral, isosceles, scalene, obtuse, right, and acute based on their sides and angles. The video also covers the concept of congruency, demonstrating how two ...

So equilateral triangles are constructible with a compass and straightedge, QED. Congratulations on persisting through the first proposition in the first book of Euclid’s Elements . Only 13 more ...

Henry Dudeney, a self-taught English mathematician and puzzle columnist, asked his readers to dissect an equilateral triangle into the smallest number of pieces that could be rearranged into a square.

Interior angles in an equilateral triangle close equilateral triangle A triangle with all three sides of equal lengths. All the angles are 60°. ... Form an equation equal to 360˚.