calculate the area of an equilateral triangle,whose height is 20cm
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Given height of equilateral triangle = 20 cm
Area of equilateral triangle with
height 'h' = 3h2
∴ Area of equilateral triangle = 3(20)2
=3400×33
=34003 sq. cm
Given sides of triangle
17 cm . 8 cm . 15 cm
By Pythagorous theorem
(15)2+(8)2=(17)2
It is a right angled triangle
∴ Area of triangle = 21×b×h
=21×15×8
= 60 sq cm
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