Question

5. The perimeter of the shown

triangle is 21 cm. Find the lengths
of its sides.
7x - 5
7 - 3(x - 1)
14 - 3x

Answer 1

7 cm

Step-by-step explanation:

An equilateral triangle has all sides equal.

To find the measure of the side, simply divide the perimeter by 3. This is because a triangle has 3 sides.

21 ÷ 3 = 7