Geometry Vocabulary Review Flashcards
All sides are the same length
Equilateral Triangle
Two sides are the same length
Isosceles Triangle
All sides are different lengths
Scalene Triangle
One angle that is greater than 90 degrees
Obtuse Triangle
All angles are less than 90 degrees
Acute Triangle
One angle that is equal to 90 degrees
Right Triangle
A plane figure that has three straight sides and three angles.
Triangle
A triangle that has one angle that is greater than 90 degrees
Obtuse angle
A angle that has one angle that is equal to 90 degrees
Right angle
A triangle that has all angles that are less than 90 degrees
Acute angle
A straight line - two rays pointing in the opposite directions and it equals 180 degrees
Straight angle
Lines that form square corners when they intersect, they form right angles
Perpendicular lines
Part of a circle that represents an angle between two intersecting lines.
Arc
The point where two rays meet
Vertex
Two angles that form a right angle are called ______ angles that equal 90 degrees
Complementary angles
Two angles combine to form a straight angle
Supplementary angles
Having the same measurement
Congruent
Two non-adjacent angles are formed by two intersecting lines (They are congruent)
Vertical angles
____ angles are any two angles that share a common side and a vertex
Adjacent angles
Lines that will never cross and are the same distance apart and may go on forever
Parallel Lines
When lines cross
Intersecting lines
A starting point that extends in one direction that goes on without end
Ray
A collection of points that extends in both directions without end
Line
A part of line with two endpoints
Line Segment
