Question

This isosceles triangle has two sides of equal length, a.

that are longer than the length of the base 5. The
perimeter of the trianglets 15.7 centimeters. The
equation 2a+b=15.7 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