Always, Sometimes, or Never

Fact or Fiction

Find an Example in the Room

Determine from the Diagram

Miscellaneous

100

Two lines that do not intersect are parallel.

Always

100

Two rays with the same endpoint form an angle.

FACT

100

The line at which two planes intersect

(Show someone an example in the room and see if they agree.)

100

Point B is between A and C. Segment AC is 20 and BC is 4, find AB.

16

100

A location in space is the definition of a...

point

200

If Point B is between points A and C, AB is congruent to BC.

Sometimes (only if B is the midpoint)

200

If two angles form a straight angle, they are complementary.

FICTION

200

Two parallel lines

(Show someone an example in the room and see if they agree.)

200

Ray BC bisects angle ABD. Angle ABD is 80 degrees, so what is angle ABC?

40 degrees

200

If B is between points A and C, AB + BC = AC. Name the postulate that tells us this is true.

The Segment Addition Postulate

300

Two lines intersect at a point.

Always

300

If points A and B lie in plane P, then so does any point of ray AB.

FACT

300

Three pairs of parallel planes.

(Show someone an example in the room and see if they agree.)

300

Segment RS and Segment CD bisect each other. They also intersect at point O. Name all of the congruent pieces.

RO is congruent to OS. CO is congruent to OD.

300

Define a ray.

A ray starts at a point but continues forever.

400

There are only two points on a line.

Never

400

If angle ABC + angle CBD = angle ABD, then point C is on the interior of angle ABD.

FACT

400

Two lines that intersect in the same plane.

(Show someone an example in the room and see if they agree.)

400

The ledge of a whiteboard is parallel to the cork board strip at the top of the whiteboard. What is the plane that contains both lines.

The whiteboard

400

True or False: If O, N, and P are collinear, they are coplanar.

True

500

A bisector of a line segment creates two supplementary angles

Always

500

Two intersecting lines are coplanar.

FACT

500

Three planes intersecting.

(Show someone an example in the room and see if they agree.)

500

D is the midpoint between point X and point Y. If segment DX=4x+3 and XY=3x+10. Find x.

x=4/5

500

An angle is double its complement. Find the angle

60