Question

12. Calculate the area and the height of an
equilateral triangle whose perimeter is 60 cm.

Answer 1

Answer:

the area of the triangle is 173.21 cm^2 .

Step-by-step explanation:

As the triangle is equilateral , its side are equal ,

Let its side be equal to "a"

then ,

         3a=60

⇒        a=20cm

The Height of the triangle is 17.32 cm   (By Pythagoras Theorem)

Area of the triangle = 0.5 x Base x height

                                =  0.5 x 20 cm x 17.32 cm

                                 = 173.21 cm^2