an "irregular pentagon"
A shape with three sides is called a triangle: 3 equal sides = equilateral 2 sides same length = isosceles 1 right angle = right-angled triangle
a right angle triangle.
A right angle triangle
Ye. It's called a square.
A right angle triangle
A right-angle triangle.
A square and a rectangle.
rectangle
The sides that form the right angle are called legs. The side opposite the right angle is called the hypotenuse.
The two sides are called base and height and the sloping part of the right angle triangle is called the hypotenuse.
A Triangle~!
a triangle