Based on the angles of a + b and b + c, the value of b can be calculated to be 40°.
How many degrees is B?
As this is a triangle, all the internal angles must add up to 180°.
This means that:
a + b + c = 180°
As we have the value of b + c, this becomes:
a + 100 = 180
a = 80°
b is therefore:
a + b = 120
80 + b = 120
b = 120 - 80
= 40 °
Full question is:
If in triangle abc, angle a + angle b= 120° and angle b + angle c = 100°, then find angle b.
Find out more on the internal degrees of a triangle at https://brainly.com/question/7888180.
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