A right-angled triangle is a type of triangle that has one of its angles equal to 90 degrees. The longest side of the right triangle, which is also the side opposite the right angle, is the hypotenuse and the two arms of the right angle are the height and the base. Egyptians used the concept of right triangles to design pyramids.
Types of right triangles
- Isosceles right triangle: In this triangle, one interior angle measures 90°, and the other two angles measure 45° each.
- Scalene right triangle: This triangle is the one in which one interior angle measures 90°, while the other two measure 30° and 60°.
Consider the triangle
a is the perpendicular,
b is the base,
c is the hypotenuse.
Pythagoras theorem states that “In a right-angled triangle, the square of the hypotenuse side is equal to the sum of squares of the other two sides“.
Then c2 = a2 + b2.