Suggested Answer
Answer:see explanationStep-by-step explanation:m + 20 and 100 are vertically opposite angles and are congruent , thenm + 20 = 100 ( subtract 20 from both sides )m = 80
Answer:see explanationStep-by-step explanation:m + 20 and 100 are vertically opposite angles and are congruent , thenm + 20 = 100 ( subtract 20 from both sides )m = 80