Free practice questions for Intermediate Geometry - How to find the area of a pentagon. Includes full solutions and score reporting. read more
To calculate the area of a regular polygon, use the specific formula for that shape. For a triangle, multiply ½ by the length of the base and the height. For a square or rectangle, multiply the length of the base by the height. read more
The regular pentagon is an example of a cyclic pentagon. The area of a cyclic pentagon, whether regular or not, can be expressed as one fourth the square root of one of the roots of a septic equation whose coefficients are functions of the sides of the pentagon. read more