Basic Constructions

What is being represented in the image?

• Diameter

• Chord

• Radius

• Concentric Circles

To construct an equilateral triangle, all you need is a compass and a straightedge.

• True

• False

Which one is the correct construction for a perpendicular bisector?

• 1

• 2

• 3

• 4

Based on the construction, which conclusion is not always true?

What kind of intersecting lines are these?

• Parallel Lines

• Perpendicular Lines

• Right Lines

• Scalene Lines

.
.
.
What kind of lines are these?

• Parallel Lines

• Perpendicular Lines

• Right Lines

• Scalene Lines

A line, segment, or ray that passes through the midpoint of a side that is creates a 90 degree angle with that side.

• Perpendicular bisector

• Angle bisector

• Median

• Altitude

Suppose we wish to construct angle EFG congruent to angle DBC using a compass and straightedge. Which step would be correct to do first?

• 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

Which diagram shows a correct mathematical construction using only a compass and a straightedge to bisect an angle?

• A

• B

• C

• D

Given: angle A
What is the first step in constructing the angle bisector of angle A?

• 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.