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given: angle KLM and angle NML are right angles. angle 2 is congruent to angle 3. Prove: angle 1 is congruent to angle 4

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angle KLM=angleNML=90°
the sum of angles in a triangle is 180°
since: angle2=angle3=x
angle1=angle4=y because
180°-90°-x=180°-90°-x
User Rodrigo Gama
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