Which angles are supplementary? ∠MKN and ∠OKN ∠PKO and ∠MKN ∠LKM and ∠MKN ∠PKO and ∠PKL Image shows 2 intersecting lines and a ray sharing a point resulting in 5 consecutive angles. Line P N intersects line O M at point K. Ray K L shares the same point K. The 5 consecutive angles formed clockwise from the left are angle P K L, angle L K M, angle M K N, angle N K O, and angle O K P. Angle P K L is a right angle.

Statements reasons 1. ab ? cd; ad ? bc 1. given 2. ac ? ac 2. reflexive property 3. ? adc ? ? cba 3. ? 4. ? dac ? ? bca; ? acd ? ? cab 4. cpctc 5. ? dac and ? bca are alt. int. ? s; ? acd and ? cab are alt. int. ? s 5. definition of alternate interior angles 6. ab ? cd; ad ? bc 6. converse of the alternate interior angles theorem 7. abcd is a parallelogram 7. definition of parallelogram what is the missing reason in step 3?