Question

the length of three sides of a traingle are 20 cm,1,6 cm and 12cm .the area of the traingel is​

Answer 1

Answer:

use herons formula

Step-by-step explanation:

Area = root of [s(s-a)(s-b)(s-c)]

s is the semiperimeter(half of the perimeter)

Answer 2

$\large{\boxed{\bf{Answer}}}$

96cm²

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Given :-

• Length of a triangle are 20cm, 16cm and 12cm.

To Find :-

• Area of the traingle

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$\large{\boxed{\bf{Solution}}}$

• a = 20

• b = 16

• c = 12

Semi - perimeter ( S ) :-

$\frac{a + b + c}{2}$

$= > \frac{20 + 16 + 12}{2}$

$= > \frac{48}{2}$

$= > 24$

★ Area of the triangle :-

$\sqrt{s(s - a)(s - b)(s - c)}$

$= > \sqrt{24(24 - 20)(24 - 16)(24 - 12}$

$= > \sqrt{24 \times 4 \times 8 \times 12}$

$= > \sqrt{9216}$

$= > \sqrt{96 \times 96}$

$= > 96$

Hence, area of the traingle is 96cm².

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