Question

What is the altitude of an equilateral triangle whose side is 8cm??

Answer 1

Answer:

Side of equilateral triangle = 8 cm

Area of equilateral triangle = root 3/4a^2

                                             = root 3/4*8^2

                                             = root 3/4*64

                                             = 16 root 3

Again,area of equilateral triangle = 1/2*b*h

Base of equilateral triangle = 8 cm

                              16 root 3 = 1/2*8*h

                                          h = 16 root 3/4

                                          h = 4 root 3