Question

The given figure is made up of 10 equilateral triangles. If the length of AB is 142 cm, then find the total perimeter of the figure. (B) 484 cm (D) 568 cm (A) 592 cm (C) 388 cm.
kindly give me the right answer along with step-by-step explanation​

Answer 1

Answer:

568 cm

Step-by-step explanation:

Given: 10 equilateral triangles are joined such way AB = 142

           As we know,

                                All the three sides are equal in equilateral triangle.

let the all side be X

hence AB is made by joining of 5 sides of equilateral triangle.

so,   AB= 5X

      142cm = 5X

X= 142/5cm

One side = 142/5cm

therefore,

Total perimeter of given figure = Total number of side × length of one side.

                                                   = 20 × 142/5cm

                                                   = 568 cm