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2 cards from this section. Quick, good the night before a test.
What is the sum of the interior angles of a triangle?
Think about the properties of triangles!
If two angles in a triangle are 30° and 60°, what is the third angle?
Use the angle sum property!
What is the sum of the angles in a triangle?
Recall the triangle angle sum property.
True or False: An exterior angle is greater than either of the two opposite interior angles.
Think about the relationships between the angles.
Given triangle DEF, angle D = 75°, angle E = 30°. Calculate angle F and verify using the exterior angle theorem by extending side DE.
Use the angle sum property to find angle F first.
In triangle GHI, if angle G is increased to 90° while maintaining triangle properties, what effect does this have on angles H and I? Provide analysis.
Reflect on how the angles interact in maintaining the sum of 180°.
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