Question

An isosceles triangle has two sides of equal length, a, and a base, b. The perimeter of the triangle is 15.7 inches, so the equation to solve is 2a + b = 15.7. Which lengths make sense for possible values of b? Check all that apply. –2 in. 0 in. 0.5 in. 2 in. 7.9 in.

Answer 1

2 a + b = 15.7
Since the sides are equal length, the equation is:
2 · 6.3 + b = 15.7
We can solve it:
12.6 + b = 15.7
b = 15.7 - 12.6
b = 3.1 cm

Answer 2

0.5 in

2 in this is correct 8/3/18 ☑️