volume_mute
Find the Base of an Isosceles Triangle
publish date: 2026/05/16 20:57:4.867934 UTC
volume_mute
A structural truss is in the shape of an isosceles triangle. A total of 76 linear feet of lumber was used. Each of the two equal sides is 20 feet long. How long is the base of the truss?
Correct Answer
36 ft
Explanation
Let \(b\) = length of the base. Then:
\[b + 20 + 20 = 76\]\[b + 40 = 76\]\[b = 36\]
The base of the truss is 36 feet. Check: \(36 + 20 + 20 = 76\) ✓
Reference
Mathematics for college students