Question 907973
A=1/2bh area formula for a triangle
h=8
A=4b
A=84
84=4b
b=21
I solved for the base because it is one of the sides of the triangle.
The perimeter is the sum of all the sides of the triangle.
x=The unknown side of the triangle.
21+10+x=48
31+x=48
x=17