The area of a polygon is the number of square units inside the polygon. To understand the difference between perimeter and area, think of peri

Area of Plane Shapes. Learn more about Area, or try the Area Calculator. ... h = height, Parallelogram Area = b × h b = base h = v

Triangle Area = ½ × b × h b = base h = vertical height, Square Area = a2 a = length of side. Rectangle

The altitude (or height) of a trapezoid is the perpendicular distance between the two bases.

of a square since a rhombus is a particular kind of kite (one where all four sides are congruent) ...

radius of a circle or sphere is the length of a line segment from its center to its perimeter. The name comes from Latin radius

A straight line going through the center of a circle connecting two points on the circumference.

diameter of a circle is any straight line segment that passes through the center of the circle and whose endp

by the formula below. area = (½)(apothem

joining two points on the circumference (edge) of a circle. (The larger arc is called the Major Arc). See: Arc ...

Circumference (from Latin circumferentia, meaning "to carry around") is the linear distance around the edge of a closed curve or circular object.

joining two points on the circumference (edge) of a circle. (The shorter arc is called the Minor Arc). See: Arc ...

an irregular arc segment is also called rectification of a curve. Historically, many methods were used for specific curves

more commonly called the area of a circle, of radius r is equal to πr². Here the symbol π denotes the constant ratio of t

the Area of a Sector by comparing its angle to the angle of a full circle. Note: I am using radians for the