CK12 - Geometry

7. ____.

8. ____.

9. ____.

10. ____.

11. ____.

12. ____.

13. ____.

Answers

1. Yes. If alternateinterioranglesare congruent,then the lines are parallel[Diff: 1].


2. No. Sincealternateexterioranglesare NOTcongruentthe lines are NOTparallel[Diff: 1].


3. No. Sincealternateinterioranglesare NOTcongruent,the lines are NOTparallel.[Diff: 1].


4. Yes. If correspondinganglesare congruent,then the lines are parallel[Diff: 1].


5. Yes. If exteriorangleson the sameside of the transversalare supplementary, then the linesare parallel
   [Diff: 2].
   6.. Since and are a linearpair, they are supplementary[Diff: 2].
   7.. is an interiorangleon the sameside of transversal with the anglemarked So

and the angleare supplementaryand [Diff: 3].

8.. is a verticalangleto the anglemarked [Diff 2]
9.. It is a correspondinganglewith angle [Diff: 3].
10.. It is a linearpair with a right angle[Diff: 1].
11.. It is a correspondinganglewith the anglemarked [Diff: 3].
12.. It is a verticalanglewith [Diff: 2].
13.. It is a linearpair with the anglemarked [Diff: 2].

Slopesof Lines

LearningObjectives

• Identifyand computeslopein the coordinateplane.


• Use the relationshipbetweenslopesof parallellines.


• Use the relationshipbetweenslopesof perpendicularlines.