Question

EXERCISE 12.1
1. Find the area of a triangle whose sides are respectively 150 cm, 120 cm and 200 cm

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Answer 1

Answer:

A = 150cm

B = 120cm

C = 200cm,

We can solve it by Heron's formula:-

So semi perimeter will be,

⇒150+120+200

2

⇒235 cm

So,By herons's formula:-

√s(s-a)(s-b)(s-c)

where a=150 cm......b=120 cm......c=200 cm

By implying values:-

⇒√235(235-150)(235-120)(235-200)

⇒√235×85×115×35

⇒√80399375

⇒8966.57 cm²

So the area is :- 8966.57cm²