Angles
This angle is a complete circle
360 degrees
What is a four-sided shape called?
Quadrilateral
5*4=?
20
16/8=?
2
24+24=?
48
This angle is always less than 90 degrees
Acute angle
Hexagon
6*3=?
18
24/6=?
4
360-90=?
270
This angle is always less than 180 degrees but always greater than 90 degrees
Obtuse angle
What is a five-sided shape called?
Pentagon
9*4=?
36
144/12=?
12
180+180=?
360
This angle is always 180 degrees
Straight angle/line
What is a nine-sided shape called?
Nonagon
12*2=?
24
360/90=?
4
270-90=?
180
This angle is always greater than 180 degrees, but always less than 360 degrees
Reflex angle
What is a ten-sided shape called?
Decagon
12*12=?
144
720/90=?
8
720-90=?
630