Question

The side lengths of a triangle are in the ratio 2 : 3:4.

The longest side has a length of 28 cm.
What is the perimeter of the triangle?
Give your answer in centimetres (cm).

Answer 1

Answer: 63

Explanation:

In the ratio, the longest side is 4. 4x7 is 28, so to make the ratios proportional again, you multiply all the sides by 7, getting 14:21:28.

These are the side lengths of the triangle, and to find the perieter you add all of them up, getting 63.

Hope this helps :)

Answer 2

It is 63 cm

Explanation:

Take 28/4 = 7. That is what1 equals in the proportion. So, we take 2 x 7, 3 x 7, and 4 x 7. Then you just add the sides together and it equals 63 cm.