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Mathematics, 04.07.2019 04:00 lovelyb32p1waxd
Given: δabc prove: m∠zab = m∠acb + m∠cba 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: δabc prove: m∠zab = m∠acb + m∠cba we start with triangle abc and see that angle zab is an e...
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