Question

25. The given figure is made up of 3 identical equilateral triangles. Find the perimeter of the whole figure?

(A) 61 cm (C) 63 cm (B) 62 cm (D) 65 cm​

Answer 1

Solution :

Here, the measurement of one side of a triangle is given as 9 cm.

It is mentioned that the three are all identical equilateral triangles .

So, each of the sidelengths are 9 cm each.

Total perimeter

>> AB + BC + EG + FG + (CD + DE) + 4 + 5

>> 4 × 9 + (4+5) + (4+5) + 9

>> 45 + 18

>> 63 cm.

Option C is the required answer.

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