Question

Find the area of a triangle two sides of which are the 18cm and 10cm and the perimeter is 42cm​

Answer 1

Step-by-step explanation:

Let the unknown side be x

Perimeter=sum if sides of a triangle

SO x+18+10=42

x+28=42

x=42-28

x=14

Area of the triangle is

root s(s-14)(s-18)(s-10)

s=perimeter/2

s=42/2=21

root 21×7×11×3

root 21×77×3

root 63×77

root 4851

69.650 approx

Answer 2

Step-by-step explanation:

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