Question

find the area of an equilateral triangle with side 20 cm ...... use the formula
$\sqrt{3 \div 4 } \times side {}^{2}$

Answer 1

Hey!!!

We have, for equilateral triangle , side = 20 cm

Thus Area = √3/4 x side ²

=> √3/4 x 20 x 20

=> √3 x 100

=> 1.73 x 100

=> 173 cm²

Hope this helps

Answer 2

root 3 × 20 × 20
------------------------
4
root 3 × 5 × 20
100 × root 3 = ans