Question

This isosceles triangle has two sides of equal length that are longer than the length a of the base b the perimeter of the triangle is 15.7 centimeter 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

The answer is 3.1 cm
Solution:
2(6.3)+b=15.7
12.6+b=15.7
subtract 12.6 from btohs ides
b=3.1
answer is base=3.1 cm