Question

the semi perimeter of a triangle having the length of its sides are 20cm , 15cm and 9cm is ​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

Step by Step Explanation :

Given sides of the triangle are 20 cm, 15 cm & 9 cm.

We've to find the semi perimeter of the traingle.

By using Formula :

$\star \ \boxed{\sf{\purple{S_{(semi perimeter)} = \dfrac{a + b + c}{2}}}}$

a = 20

b = 15

c = 9

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☯ Substituting values in the formula ;

$:\implies\sf S = \dfrac{a + b + c}{2} \\\\\\:\implies\sf S = \dfrac{20 + 15 + 9}{2} \\\\\\:\implies\sf S = \dfrac{\cancel{44}}{\cancel{\: 2}}\\\\\\:\implies\boxed{\sf{\purple{S_{(semi perimeter)} = 22}}}$

${\therefore} \: \underline{\sf{Semi perimeter \ of \ the \: \triangle \ is \ 22 \ cm.}}$