Unformatted text preview: 6.2 Law of Cosines and Heron's Formula Test retakes: Oct 17-21. You can retake any or
all parts. Your retake erases your previous
Quiz on Friday!
My availability for next week:
Law of Sines, Law of Cosines
W Th F
Before School Y
After School rm 19 N Y
1. Whiteboard Work
2. Lesson: 6.2 Law of Cosines and Heron's Formula
Determine the number of triangles and solve the triangle(s), if possible.
Tuesday, October 11, 2011
6:53 AM ________________________
Lesson: 6.2 Law of Cosines and Heron's Formula
1. Solve oblique triangles using Law of Cosines
2. Find the area of triangles using Heron's Formula
Law of Cosines: If you are given 3 sides (SSS) or two sides and their included angle
(SAS), then: Ch_6 Page 1 Heron's Formula
Given any triangle with sides of length and , the area of the triangle is: where
Use Law of Cosines to find the missing side (or angle), then Law of Sines to find
Solve the triangle (SAS) Solve the triangle (SSS) (Use Law of Cosines to find the largest angle) Ch_6 Page 2 Find the area of the triangle with side lengths ________________________ Ch_6 Page 3 . ...
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