CK12 - Geometry

Areaof Trapezoidwith Bases and and Altitude

Trapezoidwith bases and and altitude

or

Noticethat the formulafor the area of a trapezoidcouldalso be writtenas the "Averageof the basestime
the height."This may be a convenientshortcutfor memorizingthis formula.

Example 1

Whatis the area of the trapezoidbelow?

The basesof the trapezoidare and. The altitudeis.

Areaof a Rhombusor Kite

First let’s start with a reviewof someof the propertiesof rhombiand kites.