Theorem: The sum of the measure of the angles of any triangle is 180°. Proof: Given: The top line (that touches the top of the triangle) is parallel to the base of the triangle. Prove: mz1+ mz3 + mz2 = 180° 5 1 2 A B Statements |Reason 1. mz4 = mz1 1. 2. mz5 = mz2 2. 3. Three angles form one side of the straight line 4. 3. 4. mz1 + mz3 +mz2 = 180°
Theorem: The sum of the measure of the angles of any triangle is 180°. Proof: Given: The top line (that touches the top of the triangle) is parallel to the base of the triangle. Prove: mz1+ mz3 + mz2 = 180° 5 1 2 A B Statements |Reason 1. mz4 = mz1 1. 2. mz5 = mz2 2. 3. Three angles form one side of the straight line 4. 3. 4. mz1 + mz3 +mz2 = 180°
Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter8: Applications Of Trigonometry
Section8.2: The Law Of Cosines
Problem 48E
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