Topics
7. Proof & Congruence
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United States of AmericaUT
Math II

7.02 Proving lines parallel

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Practice

Interactive practice questions

Are the lines $\overleftrightarrow{AB}$›‹AB and $\overleftrightarrow{CD}$›‹CD parallel?

A transversal line intersects two vertical lines. The line on the left passes through points $A$A and $B$B. The line on the right passes through points $C$C and $D$D. The angle to the right of line $AB$AB and below the transversal line is labeled and measures $110^\circ$110°. The angle to the left of line $CD$CD and above the transversal line is labeled and measures $110^\circ$110°. Both angles are between the two lines $AB$AB and $CD$CD and on opposite sides of the transversal line.

Yes

A

It cannot be determined

B

No

C
Easy
< 1min

Are the lines $\overleftrightarrow{AB}$›‹AB and $\overleftrightarrow{CD}$›‹CD parallel?

Easy
< 1min

Are the lines $\overleftrightarrow{AB}$›‹AB and $\overleftrightarrow{CD}$›‹CD parallel?

Easy
< 1min

Are the lines $\overleftrightarrow{AB}$›‹AB and $\overleftrightarrow{CD}$›‹CD parallel?

Easy
< 1min
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Outcomes

II.G.CO.9

Prove theorems about lines and angles. Theorems include: vertical angles are congruent; when a transversal crosses parallel lines, alternate interior angles are congruent and corresponding angles are congruent; points on a perpendicular bisector of a line segment are exactly those equidistant from the segment's endpoints.

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