Question

PLZ HELP!! I REWARD BRAINLIEST. plz no silly answers i grinded for these points

Answer 1

Answer:

• 180° - 1/2(α + β)

Step-by-step explanation:

The two angles of the triangle ADB are:

• m∠A/2 and m∠B/2 or
• α/2 and β/2

The three interior angles add to 180°, so the missing angle is:

• m∠ADB = 180° - 1/2(α + β)