Area of Polygons

Square/Rectangle

Bh

Parallelogram

Bh

Triangle

1/2(bh)

Equilateral Triangle

Trapezoid

1/2h(b1xb2) where h is the height and b1 and b2 are the lengths of the two parallel sides.

Kite

The area of a kite is calculated as 1/2(d1xd2), where d1 and d2 are the lengths of the diagonals.

Rhombus

The area of a rhombus can be calculated using the formula 1/2(d1xd2), where d1 and d2 are the lengths of the diagonals.

Sum of Interior Angles

The sum of interior angles of a polygon is calculated using the formula (n-2)×180°, where n is the number of sides of the polygon.

Individual Interior Angle

The measure of any interior angle of a regular polygon can be calculated by the formula ((n-2)×180°)/n, where n is the number of sides.

Sum of Exterior Angles

The sum of the exterior angles of any polygon is always 360°, regardless of the number of sides.

Individual Exterior Angle

The measure of any exterior angle of a regular polygon can be calculated by the formula 360°/n, where n is the number of sides.