CPM Geometry

If the lines creating the marked angles (with the transversal) were parallel, these angles would be

• congruent

• supplementary

• complementary

• similar

• unrelated

Answer explanation

If the lines are parallel, the angles formed by a transversal are congruent. This means they have the same measure, making 'congruent' the correct choice.

Complementary angles add up to _____ degrees.

Answer explanation

Complementary angles are defined as two angles that add up to 90 degrees. Therefore, the correct answer is 90 degrees.

Supplementary angles add up to ______ degrees.

Answer explanation

Supplementary angles are defined as two angles that add up to 180 degrees. Therefore, the correct answer is 180 degrees.

In the diagram above, vertex C' is best read as which of the following?

• point C prime

• point C tick mark

• point C

• point C to the first power

• Bobby McFinklestein

Answer explanation

Vertex C' is denoted as 'C prime', indicating a modified or distinct point from C. The prime symbol (') is commonly used in geometry to represent such variations, making 'point C prime' the correct interpretation.

The angles indicated in the diagram above are _________________.

• corresponding angles

• vertical angles

• same-side interior angles

• alternate interior angles

• alternate exterior angles

Answer explanation

The angles indicated are same-side interior angles because they lie on the same side of the transversal and between the two parallel lines. This relationship defines them as same-side interior angles.

The angles indicated in the diagram above are _________________.

• corresponding angles

• vertical angles

• same-side interior angles

• alternate interior angles

• alternate exterior angles

Answer explanation

The angles indicated in the diagram are corresponding angles because they are in the same relative position at each intersection of the transversal with the parallel lines.

The angles indicated in the diagram above are _________________.

• corresponding angles

• vertical angles

• same-side interior angles

• alternate interior angles

• alternate exterior angles

Answer explanation

The angles indicated are alternate interior angles because they are on opposite sides of the transversal and inside the two parallel lines. This relationship defines them as alternate interior angles.

The slopes of parallel lines are...

• the same

• opposite

• always different

Slopes of parallel lines are...

• negative reciprocals.

• opposites.

• the same.

• always 7.

Which answer shows a reflection across the x-axis?

• d

• c

• b

• a