Question

Three equilateral triangles are cut from a larger equilateral triangle of perimeter 60 cm.
The perimeter of the resulting shape F is 40 cm. What is the sum of the perimeters of the
triangles that are cut out? (60cm)

Answer 1

Step-by-step explanation:

let a = side of bigger triangle

perimeter of bigger triangle = 60cm

a +a + a = 60 cm

3a = 60cm

a= 60 / 3

a = 20 cm

by taking 20 cm as side of smaller triangles

perimeter of smaller triangle = 20 +20 +20 = 60 cm

hope it will help you