Draw an arc above point A

Measure the length of segment AB

Draw an arc between point A and point B

Measure half the length of line segment AB

A

B

C

D

The radius

The diameter

Half of the radius

It depends on the size of the circle

Place the compass point at B

Place the compass point at C

Place the straightedge along A and C

Place the straightedge along C and D

Mark the point M

Measure the angle AOB

Copy the angle with an arc

Connect point M and vertex O

Construct a perpendicular bisector

Draw a second diameter to the circle

Construct a line tangent to the circle

Set your compass the length of the radius.

A

B

C

D

an angle bisector

a line parallel to a given line

an angle congruent to a given angle

a perpendicular bisector of a segment

Draw ray AD

Draw a line segment connecting points B and C.

From points B and C, draw equal arcs that intersect at D.

From point A, draw an arc that intersects the sides of theangle at points B and C.

A

B

C

D