Circles, Semi Circles and Quarter Circles

What is a Semicircle

• A square

• Pineapple

• Half of a circle or circumference that is cut off in the middle.

• A quarter of a circle

Is the red line a radius or diameter of the circle?

• Radius

• Diameter

What is a Chord

• The line between one half and the other

• The segment between to points on a circle

What do we call the red line?

• Chord

• Arc

• Diameter

• Segment

An arc is...

• A line that passes through the center and goes from edge to edge.

• A part of the circumference.

• A boat.

• A line that touches the circle once.

What is the part of the circle highlighted in red called?

• semi-circle arc

• major arc

• minor arc

• sector

This is a picture of ___________.

• Minor Arc

• Major Arc

• Semi-Circle

• Central Angle

How long is the radius of this circle?

• 4cm

• 2cm

• 8cm

• 16cm

• 3cm

• 2cm

• 4cm

• 1cm

The line segment which joins centre of the circle and any point on the circle is called

• Diameter

• Radius

• Chord

• Segment