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1. m/CBD = 90°
2. ZABC and ZCBD are supplementary.
4. m/ABC+90° = 180°
6. LABC is a right angle.
7. A ABC is a right triangle.
m/ABC= 90°
m/ABC+m/CBD = 180°
Reason
Given
Definition of supplementary
m/ABC+m/CBD = 180°
Subtraction Property of Equality
Definition of right angle
Definition of right triangle
Linear Pair Postulate Substitution Property of Equality
Sagot :
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