13. Find the perimeter of a triangle that has legs that are 3 cm and 4 cm.
5 cm
7 cm
10 cm
12 cm

perimeter of a triangles are 12cm and 29cm respectively.

Step-by-step explanation:

finding the perimeter of a triangle simply means that you are finding the distance around. The simplest way to find the perimeter of a triangle is to sum up all its sides.

mathematically,

perimeter of a triangle = side A + side B + side C

perimeter of a triangle = 3cm + 4cm + 5cm

perimeter of a triangle = 12cm

for the second triangle according to the question

it says the triangle has sides, 7cm, 10cm, 12cm

perimeter of a triangle = 7cm + 10cm+ 12cm

perimeter of a triangle = 29cm

picture below

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step-by-step explanation: