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Parallel Lines Intersected by a Transversal

Author:Cassie, rbwalker15
a and b are parallel lines. They are cut by transversal c. Drag the blue points on c to move the transversal. Note: Do not allow the blue points to fall inside the parallel lines or the angles will disappear!

Identify a pair of Corresponding Angles.

What is the relationship between the angle measures?

Select all that apply
  • A
  • B
  • C
Check my answer (3)

Move one of the blue dots to a new point and identify another pair of corresponding angles.

What is the relationship between the angle measures?

Select all that apply
  • A
  • B
  • C
Check my answer (3)

What conclusion can you make about the angle measurement relationship between corresponding angles?

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Identify a pair of Alternate-Interior Angles

What is the relationship between the angle measures?

Select all that apply
  • A
  • B
  • C
Check my answer (3)

Move one of the blue dots to a new point and identify a different pair of Alternate Interior Angles.

What is the relationship between the angle measures?

Select all that apply
  • A
  • B
  • C
Check my answer (3)

What can you conclude about the angle measurement relationship for Alternate Interior Angles?

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Identify a pair of Same-Side Interior Angles.

What is the relationship between the angle measures?

Select all that apply
  • A
  • B
  • C
Check my answer (3)

Move one of the blue dots to a new position. Identify another pair of Same-Side Interior Angles.

What is the angle measurement relationship?

Select all that apply
  • A
  • B
  • C
Check my answer (3)

Identify a pair of Alternate-Exterior angles.

What is the relationship between the angle measures?

Select all that apply
  • A
  • B
  • C
Check my answer (3)

Move one of the blue dots to a new position. Identify another pair of Alternate-Exterior Angles.

What is the relationship between the angle measures?

Select all that apply
  • A
  • B
  • C
Check my answer (3)

What can you conclude about the angle measurement relationship between Alternate-Exterior Angles?

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Create a set of parallel lines. Create a transversal line that cuts through them.

Identify a pair of Corresponding Angles.

Use the measurement tool to determine their angle measures. Did your conclusion from the previous activity hold true?

Select all that apply
  • A
  • B
Check my answer (3)

Identify a pair of Alternate-Interior Angles.

Use the measurement tool to determine their angle measures. Did your conclusion from the previous activity hold true?

Select all that apply
  • A
  • B
Check my answer (3)

Identify a pair of Same-Side Interior Angles.

Use the measurement tool to determine their angle measures. Did your conclusion from the previous activity hold true?

Select all that apply
  • A
  • B
Check my answer (3)

Identify a pair of Alternate-Exterior Angles

Use the measurement tool to determine their angle measures. Did your conclusion from the previous activity hold true?

Select all that apply
  • A
  • B
Check my answer (3)

In your own words, describe the angles formed by parallel lines and transversals. Give examples to support your answer.

A store owner uses pieces of tape to paint a window advertisement. The letters are slanted at an 80 degree angle.

A store owner uses pieces of tape to paint a window advertisement. The letters are slanted at an 80 degree angle.

Use the the picture above to answer the following questions.

What is the measure of <1?

Select all that apply
  • A
  • B
  • C
  • D
Check my answer (3)

=

=

Use the image above to analyze the error.

Describe and correct the error in describing the angle relationship.

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Two horizontal lines are cut by a transversal. What is the least number of angle measures you need to know in order to find the measure of every angle? Explain your reasoning.

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