Homework Help: MATHS,7TH CLASS

Posted by ANNANYA on Saturday, February 19, 2011 at 9:18am.

A RIGHT ANGLED TRIANGLE ABC IS GIVEN,WHERE AB IS 5CM,AC IS 12CM,BC IS 13CM,AD IS AN ALTITUDE FROM A TO BC,FIND THE AREA OF THE TRIANGLE AND FIND AD ALSO.

MATHS,7TH CLASS - Reiny, Saturday, February 19, 2011 at 10:21am
area = (1/2)base x height
= (1/2)(5)(12) = 30

We could also consider BC as the base, then AD becomes the height
so (1/2)(13)(AD) = 30
AD = 2(30)/13
= 60/13

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