16 terms

Types of Angles

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acute

angle less than 90

obtuse

angle greater than 90

right

90 degree angle

straight

180 degree (straight line)

complementary angles

pairs of angles that add up to be 90

supplementary angles

pairs of angles that add up to be 180

vertical angles

formed by intersecting lines. Angles across from each other are congruent

sum of all angles in a triangle equal

180

acute triangle

triangle with 3 angles less than 90 degrees

equiangular triangle

triangle with all angles congruent

right triangle

has one right angle

obtuse triangle

triangle with one angle greater than 90

scalene triangle

all sides are different measures

isosceles triangle

2 congruent sides and 2 congruent angles

Equilateral triangle

all sides are congruent (same as equiangular)