Question

Find the perimeter of an equilateral triangle of side 51 m.

• A. 153 m
• B. 1530 cm
• C. 15300 cm
• D. 1530 m

Answer 1

Answer: (A), (C)

The correct options are
A 153 m
C 15300 cm

Perimeter of a closed figure = sum of the lengths of all its sides.
For an equilateral triangle, all its sides are equal.
Given: Side of the equilateral triangle = 51 m
A triangle has 3 sides.
$\therefore$ perimeter of an equilateral triangle odf side 51 m = $51\times 3$ = 153 m
153 m is also the same as 15300 cm ( since, 1 m = 100 cm)