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2 cards from this section. Quick, good the night before a test.
What is the sum of the angles in a triangle?
Think about what is stated in the angle sum property.
If angle A is 30° and angle B is 50°, what is the measure of angle C?
Use the angle sum property.
What is the sum of the angles in any triangle?
Remember the angle sum property of triangles.
True or False: An exterior angle of a triangle is equal to the sum of the two adjacent interior angles.
Think about what exterior angles relate to.
A triangle has one angle measured at 30°. If the other two angles are in the ratio 2:3, find the measures of the other two angles.
First, express angles in terms of x using the ratio.
In triangle DEF, angle D measures 40° and angle E measures 60°. If angle E is extended, calculate the measure of exterior angle D.
Use the exterior angle theorem to sum the angles.
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