27 terms

# Unit 3 Vocabulary Quiz Review

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Triangle with one right angle
Right Triangle
Triangle that has exactly one obtuse angle
Obtuse Triangle
Angles with the same measure
Congruent Angles
On the same plane
Coplanar
An angle whose measure is between 0 and 90 degrees
Acute Angle
The longest side of a right triangle; the side opposite 90 degrees
Hypotenuse
A point that divides a segment into two congruent segments
Midpoint
An angle whose measure is 90 degrees
Right Angle
Lines NOT in the same plane that do not intersect
Skew Lines
Triangle whose angles are all congruent
Equiangular
Triangle whose sides are all congruent
Equilateral
Has an endpoint and extends infinitely in 1 direction
Ray
If two lines are parallel and cut by a transversal, these angles are supplementary
Same-Side Interior
Polygon with 3 sides
Triangle
The sides with the same measure in an isosceles triangle
Legs of an Isosceles
In a triangle, the side between two consecutive angles
Included Side
A pair of angles whose sum is 90 degrees
Complementary
A pair of angles whose sum is 180 degrees
Supplementary
Switches the hypothesis and the conclusion
Converse
ONE angle whose measure is 180 degrees
Straight Angle
Lines in the same plane that do not intersect
Parallel Lines
Angles on the base of an Isosceles Triangle
Base Angles of an Isosceles
Angles on opposite sides of the transversal, located on the INSIDE of parallel lines
Alternate Interior Angles
In a triangle, the angle between two sides
Included Angle
Triangle with three acute angles
Acute Triangle
Triangle with two congruent sides
Isosceles Triangle
The side opposite the vertex angle in an isosceles triangle
Base of an Isosceles