A polygon with 4 equal sides and 4 90° angles
square
A polygon with 4 sides. Opposite sides are the same length and 4 90° angles
rectangle
A polygon with 3 sides
triangle
The space between two lines that intersect, measured in degrees
angle
How many degrees does a straight angle have?
180°
An angle that forms a corner
right angle
How many degrees does a right angle have?
90°
What is an angle that is SMALLER than 90°?
acute
What is an angle that is LARGER than 90°?
obtuse
The point where two sides meet is called
vertex or vertices
What are all shapes with at LEAST 3 straight sides and 3 angles called?
polygons
What is any figure with 4 sides called?
quadrilateral
What is a 5 sided figure called?
pentagon
What is a 6 sided figure called?
hexagon
What is a 7 sided figure called?
heptagon
What is an 8 sided figure called?
octagon
