The lengths of the sides of a triangle are in the extended ratio 5 : 7 : 10. The perimeter of the triangle is 88cm. What are the lengths of the sides?
so you know that altogether the ratio adds up to 22. just do 88/22 to find what 1 is. then just multiply 88/22=4 5=5x4 which is 20 7=7x4 which is 28 10=10x4 which is 40 the answer is 20 cm, 28 cm, and 40 cm.
