Posted by **Ivan** on Sunday, January 16, 2011 at 12:43am.

a = 12 cm

b = 14 cm

h = 8 cm.

Compute the area. How many cm2?

- Geometry -
**MathMate**, Sunday, January 16, 2011 at 10:36am
You can use Heron's formula, which calculates the area of a triangle from the lengths of the three sides.

Let a,b,c=lengths of the three sides

s=(a+b+c)/2

Area of triangle

=sqrt(s(s-a)(s-b)(s-c))

Post your answer for a check if you wish.

- correction -
**MathMate**, Sunday, January 16, 2011 at 3:39pm
I believe the figure is a trapezoid. I have misread it as a triangle (with given sides a, b and c).

The area of a trapezoid (trapezium) is

(a+b)h/2

=(12+14)*8/2

=104

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