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14 terms

Geometry Vocabulary List 2

STUDY
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justify
show or prove to be right
conjecture
an opinion or conclusion formed on the basis of incomplete information
triangle
a plane figure with three sides and three angles
obtuse
4.greater than 90° and less than 180
acute
greater than 0° and less than 90°
right angle
an angle that measure 90°
isosceles
a triangle with two congruent sides
equilateral
a triangle with all sides congruent
scalene
a triangle with no congruent sides
protractor
an instrument for measuring angles, typically in the form of a flat semicircle marked with degrees along the curved edge
supplementary
either of two angles whose sum is 180°
complementary
either of two angles whose sum is 90°
quadrilateral
a four sided figure
angle measure
the measure of an angle