Question

Jan finds the perimeter of a triangle with sides measuring 5cm, 8cm, and 12cm. What is the perimeter?

a) 15 cm
b) 25 cm
c) 30 cm
d) 45 cm

Answer 1

The perimeter of a triangle with sides measuring 5 cm, 8 cm, and 12 cm is found by adding the side lengths together, giving a total of 25 cm.

Step-by-step explanation:

To find the perimeter of a triangle, simply add the lengths of its three sides together. For a triangle with sides measuring 5 cm, 8 cm, and 12 cm, the calculation would be as follows:

1. Add the length of the first side (5 cm) to the second side (8 cm), which equals 13 cm.
2. Add the result from step 1 to the length of the third side (12 cm).
3. The sum of 13 cm and 12 cm equals 25 cm.

Therefore, the perimeter of the triangle is 25 cm. This answer matches option (b).