Recognizing Basic Constructions

The drawing shows a compass and straight edge construction of...what?

• the bisector of a given angle

• a perpendicular to a given line at a point on the line

• a perpendicular to a given line from a point NOT on the line

• an angle congruent to a given angle

The given diagram is what kind of construction?

• Perpendicular bisector

• Congruent angles

• Angle bisector

• Congruent line segments

When copying line segment AB using a straight edge and a compass, the compass should be used to:

• 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

When constructing a line parallel to a given line, you will be

• copying a segment

• bisecting a segment

• copying an angle

• constructing a perpendicular

What was duplicated?

• line

• line segment

• ray

• angle

What type of construction do you see?

• midpoint

• angle bisector

• line bisector

• altitude

The drawing shows the arcs used to construct...what?

• a bisector of a given line

• a bisector of a given angle

• a perpendicular of a given line at a point on the line

• an angle congruent to a given angle

What does the word BISECT mean?

• To cut something into more than five pieces.

• It is a plane with two sets of wings.

• A shape that has three sides.

• To cut something into two congruent pieces or in half.

What is this?

• Compass
• Circle creator
• Pencil swingy-thing
• Arc maker

An angle that measures exactly 90°

• Acute Angle
• Right Angle
• Triangle
• Straight Angle