Question

an equilateral triangle has its each side 8 cm.Find the length of its altitude and also calculaye area​

Answer 1

height^2=Side^2 + (Base/2)^2

height^2=8^2 + (8/2)^2

height^2=64 + 16

height^2=80

height=√80

height=2√20

Now area =1/2 * base * height

= 1/2*8*2√2

=8√2

=√64√2

=√128