Angles
Angles and Lines
Polygons
Triangles
Quadrilaterals
100
An angle whose measure is 90 degrees
What is a right angle
100
Two or more lines that lie in the same plane and do not intersect
What are parallel lines?
100
A five sided polygon
What is a pentagon?
100
A triangle with one right angle
What is a right triangle?
100
A quadrilateral with two pairs of opposite parallel sides
What is a parallelogram?
200
An angle whose measure is les than 90 degeres
What is an acute angle?
200
Two lines that intersect to form a right angle
What are perpendicular lines?
200
A polygon whose sides are equal in measure
What is an equilateral polygon?
200
A triangle with three acute angles
What is an acute triangle?
200
An equilateral parallelogram
What is a rhombus?
300
An angle whose measure is greater than 90 degrees
What is an obtuse angle
300
Two angles whose measures have teh sum of 90 degrees
What are complementary angles?
300
A polygon in which no diagonal is outside the polygon
What is a convex polygon?
300
A triangle with one obtuse angle
What is an obtuse triangle?
300
A quadrilateral with two distinct pairs of consecutive congruent sides
What is a kite?
400
Two angles with the same measure
What are congruent angles
400
Two angles whose measures have the sum of 180 degrees
What are supplementary angles?
400
A ten sided polygon
What is a decagon?
400
A triangle with at least two congruent sides
What is an isosceles triangle?
400
A quadrilateral with exactly one pair of parallel sides
What is a trapezoid?
500
An example that proves a statement wrong
What is counterexample
500
A ray that divides an angle into two congruent angles
What is an angle bisector?
500
Two sides of a polygon that share a common vertex
What are consecutive sides?
500
Two angles of a triangle that are opposite two sides of equal length
What are base angles
500
An equiangular rhombus or an equilateral rectangle
What is a square?
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