Angles in a triangle sum to 180° proof. Triangle exterior angle example. Worked example: Triangle angles (intersecting lines) Worked example: Triangle angles (diagram) Triangle angle
Below is the list of various geometry formulas for you according to the geometric shape. Perimeter of a Square = 4 (Side) Perimeter of a Rectangle = 2 (Length + Breadth) Area of a Square = Side 2 Area of a Rectangle = Length × Breadth