Angle Pairs Formed by a Transversal

Angle Pairs when parallel lines are cut by a transversal

8 angles are formed when a transversal crosses two parallel lines and they have the following relationships.

Angle Pairs

the angles which occupy the same relative position at each intersection where a straight line crosses two others. Angles are equal.

Corresponding angles

the angles that lie on the inner side of the parallel lines but on the opposite sides of the transversal. Angles are equal.

Alternate Interior angles

the angles that lie on the outer side of the parallel lines but on the opposite sides of the transversal. Angles are equal.

Alternate Exterior angles

two angles that are on the same side of the transversal and on the interior. Angles are supplementary.

Same-side Interior/Consecutive Angles

Match

Match the following

Alternate Interior Angles

Alternate Exterior Angles

Corresponding Angles

Same-side Interior Angles

Vertical Angles

• Alternate Interior Angles

• Alternate Exterior Angles

• Corresponding Angles

• Same-side Interior Angles

• Vertical Angles

Match

Match the following

• ∠3=∠6

• ∠2=∠7

• ∠5+∠3=180

• ∠4=∠8

Alternate Interior

Alternate Exterior

Same-side Interior

Corresponding

• Alternate Interior

• Alternate Exterior

• Same-side Interior

• Corresponding

Multiple Choice

Which of the following represents a pair of alternate exterior angles?

Multiple Choice

Which of the following represents a pair of corresponding angles?

Multiple Select

Which of the following pairs of angles are vertical angles? (There may be more than one answer?)

• ∠1 and ∠2

• ∠1 and ∠4

• ∠2 and ∠5

• ∠5 and ∠8

Multiple Select

Which of the following pairs of angles are corresponding angles?

• ∠1 and ∠2

• ∠1 and ∠4

• ∠2 and ∠6

• ∠5 and ∠8

Multiple Select

Which of the following pairs of angles are supplementary angles?

• ∠1 and ∠2

• ∠1 and ∠4

• ∠2 and ∠5

• ∠5 and ∠8

Multiple Select

Which of the following pairs of angles are alternate interior angles? (There may be more than one answer)

• ∠1 and ∠8

• ∠3 and ∠4

• ∠4 and ∠5

• ∠3 and ∠6

Multiple Select

Which of the following pairs of angles are same side interior angles?

• ∠1 and ∠8

• ∠3 and ∠5

• ∠4 and ∠5

• ∠4 and ∠6

There are only two relations; equal or supplementary. Angles are equal if they are the same angle type, angles are supplementary if they are opposite angle types.

Angle Pairs