The lengths of two sides of a right triangle are given. find the length of the third side. Round to the nearest tenth if necessary. Legs: 28 in. And 15 in.

Question

asked Jul 28, 2019 140k views

1 Answer

Mmshr · Answer 1 · 2019-08-03T15:15:45+0000

Use cosine rule:

c²=b²+a²-2ba cosC

Right triangle = 90 degrees
cosine 90 degrees = 0

c²=28²+15²-2×28×15×0
c²=28²+15²
c=√1009
c=31.8 in