Question

In an isosceles triangle two equal sides are 20 cm angle between them is 30 degree. find the area

Answer 1

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Answer 2

Answer:

$100 cm^2$

Step-by-step explanation:

Given : In an isosceles triangle two equal sides are 20 cm angle between them is 30 degree.

To Find :  Area

Solution :

Two equal sides are of 20 cm

Area of triangle = $\frac{ab Sin \gamma }{2}$

a = b = 20

$\gamma = 30$

Substitute the values in the formula :

Area of triangle = $\frac{20 \times 20 \times Sin 30 }{2}$

Area of triangle = $\frac{20 \times 20 \times \frac{1}{2} }{2}$

Area of triangle = $100 cm^2$

Hence the area of triangle is $100 cm^2$