Two corresponding sides of two similar triangles are 6cm and 14cm. If the perimeter of the first triangle is 21cm, how do you find the perimeter of the second triangle?
The perimeter of the second triangle is 49cm
because the two triangles are similar their corresponding lengths will be in the same ratio
Side 1 divided by side 2 = perimeter 1 divided by perimeter 2
and thus if the unknown perimeter is x then
So the perimeter of the second triangle is 49cm