Answer:
B .80
Explanation:
all interior angles in a triangle=180
180-(70+30)
180-100
=80
m<3 = 80
We know that the sum of all the angles in a triangle is 180.
Thus, we can find the m<3 using the equation 180 - (70 + 30) = m<3
Simplifying gives us m<3 = 80
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