Define triangle.
A polygon with three sides and three angles.
What is a quadrilateral?
A polygon with four sides and four angles.
True or false: A pentagon has five sides.
TRUE
A hexagon has ______ sides.
six
What is a heptagon?
A polygon with seven sides.
Define octagon.
A polygon with eight sides.
What is a nonagon?
A polygon with nine sides.
True or false: A decagon has ten sides.
TRUE
Fill in the blank: A dodecagon has ______ sides.
twelve
What type of triangle has all sides equal?
An equilateral triangle.
Define isosceles triangle.
A triangle with two or three sides of equal length.
What is a scalene triangle?
A triangle with all sides of different lengths.
True or false: A right triangle has one angle equal to 90 degrees.
TRUE
Fill in the blank: A trapezoid has one pair of ________ _____.
parallel sides.
What is a parallelogram?
A quadrilateral that has 2 pairs of parallel sides.
Its opposite sides are the same length.
Define rectangle.
A parallelogram with four right angles.
What is a rhombus?
A parallelogram with all sides equal in length.
True or false: All rectangles are rhombuses.
FALSE
Fill in the blank: A kite has two pairs of ______ sides that are equal.
adjacent
What is a regular polygon?
A polygon with all sides and angles equal.
Define concave polygon.
A polygon with at least one interior angle greater than 180 degrees.
What is a convex polygon?
A polygon where all interior angles are less than 180 degrees.
True or false: A triangle can be both isosceles and right.
TRUE
Fill in the blank: A square is a type of ______.
rectangle and rhombus
