6.2 Law of Cosines and Heron's Formula

6.2 Law of Cosines and Heron's Formula - 6.2 Law of Cosines...

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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 score. Quiz on Friday! My availability for next week: Law of Sines, Law of Cosines M T W Th F Before School Y Y Y Y Y Lunch Y NY Y N Agenda: After School rm 19 N Y Y N 1. Whiteboard Work 2. Lesson: 6.2 Law of Cosines and Heron's Formula ________________________ Whiteboard Work 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 Goals: 1. Solve oblique triangles using Law of Cosines 2. Find the area of triangles using Heron's Formula DOD 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 ________________________ Examples Use Law of Cosines to find the missing side (or angle), then Law of Sines to find everything else! 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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This note was uploaded on 11/19/2011 for the course MATH 180 taught by Professor Byrns during the Spring '11 term at Montgomery College.

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