Measurements
Angles are measured in units called ____________.
Angles are measured in units called degrees.
What type of angle is on the board?
Reflex angle
Draw a ray.
Ray
This is a _______________________.
Protractor
An acute angle is __________ than a right angle.
An acute angle is smaller than a right angle.
What is the measurement of a right angle?
90o
What is the name of the angle on the board?
Angle SAF or FAS
Draw a line segment.
Line Segment
Point to the outer scale.
Outer scale
An obtuse angle is ____________ than a right angle.
An obtuse angle is larger than a right angle.
What is the measurement of a straight angle?
180o
What is the vertex of the angle on the board?
Vertex = A
Draw a line.
Line
Point to the inner scale.
Inner scale
A straight angle is ___________ to 2 right angles.
A straight angle is equal to 2 right angles.
What is the measurement of a full circle?
360o
This point is called the __________.
This point is called the vertex.
Draw line TR parallel to HC
Parallel
What is an angle?
An angle is formed when two rays or lines or line segments meet at a point.
A reflex angle is larger than 2 right angles
but smaller than _________ right angles.
A reflex angle is larger than 2 right angles
but smaller than four right angles.