80°
Explanation: Since the sum of the angles inside a triangle must equal 180°, we can find angle B by subtracting the measures of angles A and C from 180°.
So, 180° - (70° + 30°) = 80°.
The Triangle Angle Sum Theorem states that the sum of the angles inside a triangle must equal 180°. Using this theorem, find the measure of angle B.
are you sure
(1 point)
Responses
25°
25°
335°
335°
80°
80°
45°
3 answers
are you sure
Yes, I am sure. Angle B measures 80° based on the Triangle Angle Sum Theorem.