Question

Find the perimeter of a triangle with sides measuring 3 centimeters, 4 centimeters and 5 centimeters. a. 20 cm c. 19 cm b. 12 cm d. 14 cm Please select the best answer from the choices provided A B C D

Answer 1

b. 12 cm

Explanation:

The perimeter of any shape is the sum of the lengths of its sides.

We can call the three sides of a triangle a, b, and c. Thus, the perimeter, P is given by the formula:

P = a + b + c

Thus, we can plug in 3 for a, 4 for b, and 5 for c to find P, the perimeter of the triangle in centimeters:

P = 3 + 4 + 5

P = 7 + 5

P = 12

Thus, the perimeter is 12 cm (answer b.).