Pythagorean theorem: If you know any two sides of a right triangle, you can
find the third side by using the Pythagorean theorem:
(leg 1 ) + (leg 2 )^2 = (hypotenuse)^2
For example, if one leg is 2 and the other leg is 3, then
PYTHAGOREAN THEOREM
Equilateral: Three equal sides and three 60° angles. If the length
of one side is s, then
2.
3. Right: One right angle. You can use the legs to find the area: