Question

find the area of area of an equilateral triangle of the lenth of the side equal 10cm

Answer 1

area=√3/4a²
✓3/4×10²
=25√3

Answer 2

s= a+b+c
= 10+10+10/2
=30/2=15
s=15
$\sqrt{15(15 - 10)(15 - 10)(15 - 10) \ }$
$\sqrt{15 \times 5 \times 5 \times 5}$
$25 \sqrt{3}$