Triangle Angle Sum
What is the value of T?
T = 71
What is Exterior Angle Theorem?

What do the angles of a triangle add up to?
180 degrees
What is the m∠ x
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m∠x= 149 degrees.
Find the value of ∠ x

x = 70
Solve for y.

y= 10
What is the value of ∠ a?

∠ a = 87

x=22
Solve for x.
x=27
What is the measure of the exterior angle?

m ∠ DBC = 150 degrees.