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4 cards from this section. Quick, good the night before a test.
What type of triangle has all sides equal?
Think about the prefix 'equ' meaning equal.
True or False: The sum of angles in a triangle is 90 degrees.
Consider what you know about triangles.
What type of triangle has one angle greater than 90 degrees?
Recall the definitions of triangle types.
True or False: In a scalene triangle, at least two sides are equal.
Think about what makes a scalene triangle distinct.
Prove that in a triangle, if one angle is 60 degrees, the other two angles can be either 60 or less to satisfy the triangle inequality.
Consider all combinations that sum to 180, that include one angle being fixed at 60 degrees.
If triangle ABC has angles of 40°, 60°, and x°, find x and determine if triangle ABC is acute, right, or obtuse.
Use the angle sum property and define the types of triangles based on their angles.
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