Answer: Information given below…
Explanation:
9. An equilateral triangle has all three sides of the same length.
The perimeter of the triangle is 45 cm.
To find the perimeter of a triangle, we simply add the three lengths together.
a + b + c = 45 cm (Perimeter)
15 + 15 + 15 = 45 cm.
Answer: Each of the three side lengths is 15 cm.