Mathematics
Mathematics, 09.12.2021 03:10, mariahmimibrooks

Given: ΔABCProve: m∠ZAB = m∠ACB + m∠CBATriangle A C B is shown with its exterior angles. Line A B extends through point X. Line A C extends through point Y. Line C A extends through point X. We start with triangle ABC and see that angle ZAB is an exterior angle created by the extension of side AC. Angles ZAB and CAB are a linear pair by definition. We know that m∠ZAB + m∠CAB = 180° by the. We also know m∠CAB + m∠ACB + m∠CBA = 180° because. Using substitution, we have m∠ZAB + m∠CAB = m∠CAB + m∠ACB + m∠CBA. Therefore, we conclude m∠ZAB = m∠ACB + m∠CBA using the.

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Given: ΔABCProve: m∠ZAB = m∠ACB + m∠CBATriangle A C B is shown with its exterior angles. Line A B ex...

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