One of the best known mathematical formulas is Pythagorean
Theorem, which provides us with the relationship between the sides
in a right triangle. A right triangle consists of two legs and a
hypotenuse. The two legs meet at a 90° angle and the hypotenuse is
the longest side of the right triangle and is the side opposite the
The Pythagorean Theorem tells us that the relationship in every
right triangle is:
There are a couple of special types of right triangles, like the
45°-45° right triangles and the 30°-60° right triangle.
Because of their angles it is easier to find the hypotenuse or
the legs in these right triangles than in all other right
In a 45°-45° right triangle we only need to multiply one leg by
√2 to get the length of the hypotenuse.
We multiply the length of the leg which is 7 inches by √2 to get
the length of the hypotenuse.
In a 30°-60° right triangle we can find the length of the leg
that is opposite the 30° angle by using this formula:
To find a, we use the formula above.
Video lesson: Find the sides of this right