body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} ! You must have JavaScript enabled to use this site.

McGraw Hill Glencoe Geometry, 2012

MH

McGraw Hill Glencoe Geometry, 2012 View details

6. The Law of Sines and Law of Cosines

Continue to next subchapter

Exercise 39 Page 594

Begin by using the Law of Cosines.

See solution.

Practice makes perfect

Let's begin by drawing $△ C D E$ and labeling the lengths of the sides. We will also color code the opposite angles and sides. It will help us use the Law of Sines and Law of Cosines later.

First, we can tell that it is not a right triangle, as the sides do not satisfy the Pythagorean Theorem.

48^{2} + 20^{2} \neq = 52^{2}

Let's find the measures of

∠ C,

∠ D,

and

∠ E

one at a time.

A shortcut to better grades

Download the app and create a free account to view full content

Subchapter links

Check Your Understanding p.592

Practice and Problem Solving p.593-596

H.O.T. Problems p.596

Standardized Test Practice p.597

Spiral Review p.597

Skills Review p.597