Pls help idk what the answer is

1. what is the measure of ∠abc? what is the measure of ∠abd?

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

40 points. given: two congruent angles ∠c and ∠r are supplementary. prove: ∠r and ∠c are both right angles. it doesn't have to be exactly 10 rows. statements reasons1. 1. 2. 2. 3. 3. 4. 4. 5. 5. 6. 6. 7. 7. 8. 8. 9. 9. 10. 10.