Angles.
By Shirley Sides 2006
Definition
Angle– two rays that meet at
a common end point.
Straight line.
A straight line is 180°
Right angle.
Where two lines meet perpendicular to
each other.
They are 90°
Turning circles and angles.
Quarter turn = 90°
Half turn = 180°
Three quarter turn = 270°
Full turn = 360°
Fractions for turns.
90° = ¼ turn
180° = ½ turn
270° = ¾ turn
360° =1
Angles of 90°
Add up to 90°
Angles on a straight line.
Total 180°
Angles on a straight line.
Total 180°
obtuse acute