Question

10. If a rope of length 18 cm is used to make an equilateral triangle, then find space covered by the
triangle.
(a) 6 V3 cm
(b) 9 73 cm
(c) 12 V3 cm
(d) none of these​

Answer 1

Answer:

a) 6 V3 cm

is the answer

Step-by-step explanation:

Equilateral triangles are those which have all the sides of equal measure. It means 3 equal sides. Let s be the side of the triangle. Here, perimeter = 18 cm.

So, Perimeter = 3 x s

18 = 3s

3s = 18

s =18/3 = 6

Hence, the length of each side of the triangle is 6 cm.

Answer 2

Step-by-step explanation:

Length of rope =18 cm

Length of each side = 6 cm

Area of equilateral triangle : root 3 / 4 × (side)^2

Verify the attachment to get the answer . Hope it helps.