KeyConcept Law of Cosines In AABC, if sides with lengths a, b, and care opposite angles with measures A, B, and C, respectively, then the following are true. a²=b²+²-2bc cos A b²=²+²-2ac cos B c²=²+b²-2ab cos C 1. Solve ABC. 12 O

KeyConcept Law of Cosines In AABC, if sides with lengths a, b, and care opposite angles with measures A, B, and C, respectively, then the following are true. a²=b²+²-2bc cos A b²=²+²-2ac cos B c²=²+b²-2ab cos C 1. Solve ABC. 12 O

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter10: Measurement, Area, And Volume

Section10.1: Triangles

Problem 1E

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KeyConcept Law of Cosines
In AABC, If sides with lengths a, b, and c are opposite angles with
measures A, B, and C, respectively, then the following are true.
a? = b2 +2 - 2bc cos A
b2 = q? +c2 – 2ac cos B
c2 = 0? + b2 - 2ab cos C
1. Solve a.ABC.
12

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