what is the area of the triangle whose sides are 20 centimetre 15 centimetre and 9 centimetre
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Answer:
63.27 cm ^2
Step-by-step explanation:
From Heron'S Formula , Area = √ s (s-a) (s-b) (s-c)
Given,
A = 20, b = 15 , c = 9.
s = a + b + c / 2
= 20 + 15 + 9 / 2
= 44 / 2
= 22cm
Area = √ 22 (22-20) (22-15) (22-9)
= √ 22 * 2 * 7 * 13
= √ 4004
= 63.27 cm ^2
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