Types of Angles
Angle Relationships
Triangles
Polygons
Lines
100
An angle that is greater than 0 degrees and less than 90 degrees
What is an acute angle
100
Two angles whose measures add up to 90 degrees
What are complementary angles
100
A triangle with all angles measuring less than 90 degrees
What is an acute triangle
100
A four-sided polygon
What is a quadrilateral
100
Lines in a plane that do not intersect
What are parallel lines
200
An angle that is greater than 90 degrees but less than 180 degrees
What is an obtuse angle
200
Two angles whose measures add up to 180 degrees
What are supplementary angles
200
A triangle containing an angle of 90 degrees
What is a right triangle
200
A quadrilateral with two pairs of parallel sides
What is a parallelogram
200
Lines that intersect to form right angles
What are perpendicular lines
300
An angle that is exactly 90 degrees
What is a right angle
300
A pair of opposite congruent angles formed by intersecting lines
What are vertical angles
300
A triangle containing an angle of 108 degrees
What is an obtuse triangle
300
A parallelogram with all sides congruent
What is a rhombus
300
Lines that lie in different planes that are neither parallel nor intersecting
What are skew lines
400
An angle that measures 180 degrees
What is a straight angle
400
Angles in the same plane that have a common vertex and a common side
What are adjacent angles
400
A triangle with no congruent sides
What is a scalene triangle
400
A quadrilateral with two distinct pairs of adjacent sides that are congruent
What is a kite
400
Two line segments that have the same length
What are congruent line segments
500
Angles that have the same measure
What are congruent angles
500
Angles in the same position formed when a third line intersects two lines
What are corresponding angles
500
A triangle with at least 2 congruent sides
What is an isosceles triangle
500
A polygon with congruent sides and angles
What is a regular polygon
500
A line segment that connects two non-adjacent vertices of a polygon
What is a diagonal