Final answer:
To find the measurement of the rest of the angles, subtract the given angles from 180°.
Step-by-step explanation:
The given information states that ∠M is equal to 70° and we need to find the measurement of the rest of the angles. Since the sum of the measures of angles in a triangle is 180°, we can subtract the given angles from 180° to find the measurement of the remaining angles. Therefore, ∠A = 180° - (∠M + ∠B) = 180° - (70° + ∠B) = 110° - ∠B.
Similarly, ∠C = 180° - (∠M + ∠D) = 180° - (70° + ∠D) = 110° - ∠D.