Question

If the sides of a triangle are 8 cm 11 cm and 13 cm, then the area of mangle will be
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Answer 1

Answer:

$8\sqrt{ 30 {cm}^{2} }$

Step-by-step explanation:

by using herons formula of triangle, first add the measurements and divide by 2

8+11+13=32

32/2=16

now use the formula

$\sqrt{s \times s - a \times s - b \times s - c}$

s=16;a=8b=11;c=13

$\sqrt{16 \times 16 - 8 \times 16 - 11 \times 16 - 13} \\ \sqrt{16 \times 8 \times 5 \times 3} \\ \sqrt{2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 2 \times 5 \times 3} \\ 8 \sqrt{30 {cm}^{2} }$

hence we got the answer

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