Question

An isosceles triangle in which the two equal sides, labeled a, are longer than the base, labeled b.

This isosceles triangle has two sides of equal length, a, that are longer than the length of the base, b. The perimeter of the triangle is 15.7 centimeters. The equation can be used to find the side lengths.

If one of the longer sides is 6.3 centimeters, what is the length of the base?

Answer 1

base = 3.1 cm

Explanation:

b= base

perimeter= p

from the statement we know that p=15.7 cm

moreover:

a = c = 6.3 cm

so we have:

15.7=2*a +b

15.7 = 2*6.3 +b

15.7-12.6 = b

b= 3.1 cm