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7th Triangle Vocab

Acute Angle angle that is less than 90 degrees.
Obtuse Angle angle that is more than 90 degrees and less than 180 degrees
Right Angle angle that is exactly 90 degrees. A small square is the symbol for this angle.
Straight Angle angle that is exactly 180 degrees
Scalene Triangle triangle that has NO congruent sides
Vertex the common endpoint of 2 rays (point where 2 rays/sides meet and form angle)
Degrees unit used to measure angles.
Acute Triangle triangle that has all acute angles.
Right Triangle triangle that has one right angle.
Obtuse Triangle triangle that has one obtuse angle.
Angle 2 sides/rays with a common endpoint.
Isosceles Triangle triangle that has at least 2 congruent sides
Equilateral Triangle triangle with all 3 congruent sides.
Sum of angles in a triangle 180 degrees
Complimentary Angles Sets of angles that add up to 90 degrees.
Supplementary Angles= Sets of angles that add up to 180 degrees
Triangle A shape with 3 sides and 3 angles. The sum of the angles is 180 degrees.



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