Answer:
= 90⁰
Step-by-step explanation:
We know that m∠1 is 90⁰ because the adjacent angle is 90⁰ and they form a straight line.
The sum angle measurment of a triangle is 180⁰ so we subtract m∠1 fron the total of 180 and get 90⁰.
Therefore, the sum of m∠2 + m∠3 is 90⁰.
