2023greenlanden
2023greenlanden
02.02.2021 • 
Mathematics

To Prove: m ∠1 = 90° - m ∠2 1. m∠1 + m∠2 = m∠RST Definition of right angle 2. ∠RST is a right angle. 2 Given 3. m∠1 = 90° - m∠2 5 Definition of perpendicular lines 4. m∠RST = 90° Angle addition theorem 5. Ray ST is perpendicular to Ray SR. Subtraction property of equality 6. m∠1 + m∠2 = 90° Substitution

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