Question

Does anyone know the reasoning for B

Answer 1

Answer:because angles in a triangle add up to 180 degrees.

Step-by-step explanation:

A=40

C=30

So 180-40-30=110

Answer 2

Answers

Angle A = 40
Reason - it shows the exterior angle is 320, so a full circle is 360, less 320 = 40 so your reason is correct

Angle B = 110
Reason - Angle B is a straight angle with its adjacent angle of 70. A straight angle sum is 180. 180 less 70 = 110.
* your current answer is not correct but I don’t know your choices in the drop down.
Maybe look for straight angle or adjacent angle in the answer.

Angle C = 30
your answer is correct, angle sum theory states the sum of the triangle angles equals 180.