Polygons
Angles
Diagonals
Interior Angles
Vocabulary
100
A polygon with three sides
What is a triangle
100
An angle that is exactly 90 degrees
What is a right angle
100
A triangle has this many diagonals
What is zero
100
The sum of the interior angles of a triangle
What is 180 degrees
100
The joining point of an angle or side
What is a vertex
200
A polygon with four sides
What is a quadilateral
200
An angle that is less than 90 degrees
What is an acute angle
200
A quadrilateral has this many diagonals
What is two
200
The sum of the interior angles of a quadrilateral
What is 360 degrees
200
A math word that means exactly the same or equal
What is congruent
300
A polygon with 5 sides
What is a pentagon
300
An angle that is greater than 90 degrees
What is an obtuse angle
300
A pentagon has this many diagonals
What is five
300
The sum of the interior angles of a pentagon
What is 540 degrees
300
Lines in the same plane that never touch
What parallel lines
400
A polygon with 6 sides
What is a hexagon
400
Two angles that add up to exactly 90 degrees
What are complementary angles
400
Number of diagonals in a hexagon
What is nine
400
The sum of the interior angles of a hexagon
What is 720 degrees
400
The type of polygon that has congruent sides and congruent angles
What is a regular polygon
500
A polygon with 10 sides
What is decagon
500
Two angle that add up to exactly 180 degrees
What are supplementary angles
500
Number of diagonals in an octagon
What is 20
500
The sum of the interior angles of an octagon
What is 1080 degrees
500
Lines that intersect and form four right angles
What are perpendicular lines
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