Question

find the area of an equilateral triangle having the length of a side equal to 10 cm​

Answer 1

Answer:

70.7cm ^2

Step-by-step explanation:

Find height by using pythagoras theorem

rootHeight = 10^2 + 10^2

height = approximately 14.14

Area = 1/2 l x h

Area = 1/2 10 x 14.14 = 70.7 cm^2