Geometry Proofs

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Across
  1. 3. An angle bisector divides an angle into two equal parts
  2. 6. If two angles are vertical, then they are congruent
  3. 8. If two angles are complementary, then their sum is 90°
  4. 9. If two angles form a right angle, then they are complementary
  5. 10. If two angles form a linear pair, then they are supplementary
  6. 11. Addition Postulate m∠ABC+m∠BCD=m∠ABD
  7. 12. If ∠A is supplementary to ∠B and ∠C is supplementary to ∠B, then ∠A⩭∠B
Down
  1. 1. If ∠A is complementary to ∠B and ∠C is complementary to ∠B, then ∠A⩭∠B
  2. 2. Perpendicular lines form right angles
  3. 4. If m∠A=m∠B, then ∠A∠B
  4. 5. If two angles are supplementary, then their sum is 180°
  5. 7. m∠A=90°, then ∠A is a right angle