Find the perimeter of a triangle one side is 3cm. One side is 9cm and one side is 12cm.

Answer 1

To find the perimeter of a triangle, you simply add the lengths of all the sides together.

In this case, the lengths of the sides are:

• Side 1 = 3 cm
• Side 2 = 9 cm
• Side 3 = 12 cm

Now, add them together:

\[ \text{Perimeter} = 3 , \text{cm} + 9 , \text{cm} + 12 , \text{cm} = 24 , \text{cm} \]

Therefore, the perimeter of the triangle is 24 cm.