Angles Flashcards
What is a right angle?
A 90* angle
What is an acute angle?
An angle less than 90*
What is an obtuse angle?
An angle between 90* and 180*
Draw an obtuse angle
See diagram page 165.
What is an straight angle?
An angle of 180*
Draw a straight angle
See diagram page 165.
What is a reflex angle?
An angle between 180* and 360*
Draw a reflex angle.
See diagram page 165.
What is a revolution?
360*
What are adjacent angles?
Hint- arrow shape
They have the same vertex and are alongside each other
What are complimentary angles?
Complementary angles add up to 90*
What are supplementary angles?
Supplementary angles add up to 180*
What do angles around a point add up to?
360*
In maths terms what does arm mean?
A ray of an angle
What is a vertex?
The point where the two arms of an angle meet
What is used to measure angles?
A protractor
What is a degree?
A unit used to measure angles
What are vertically opposite angles?
The equal angles formed when two straight lines intersect
See diagram on page 165