## Symbol Toolbox

parallel

perpendicular

## Keywords & Theorems

**Lines and Angles**

- Parallel
- Skew lines
- Parallel Postulate
- Perpendicular Line Postulate
- Transversal
- Corresponding Angles
- Alternate Interior Angles
- Alternate Exterior Angles
- Same Side Interior Angles

**Properties of Parallel Lines**

- Corresponding Angles Postulate
- Alternate Interior Angles Theorem
- Alternate Exterior Angles Theorem
- Same Side Interior Angles Theorem

**Proving Lines Parallel**

- Converse of Corresponding Angles Postulate
- Converse of Alternate Interior Angles Theorem
- Converse of the Alternate Exterior Angles Theorem
- Converse of the Same Side Interior Angles Theorem
- Parallel Lines Property

**Properties of Perpendicular Lines**

- Congruent Linear Pairs
- Theorem 3-1
- Theorem 3-2
- Adjacent Complementary Angles

**Parallel and Perpendicular Lines in the Coordinate Plane**

- Slope
- Slope-intercept form (intercept form)
- Standard Form

**Distance Formula**

- Distance Formula

## Review

Find the value of each of the numbered angles below.

## Texas Instruments Resources

*In the CK-12 Texas Instruments Geometry FlexBook, there are graphing calculator activities designed to supplement the objectives for some of the lessons in this chapter. See http://www.ck12.org/flexr/chapter/9688.*

### Image Attributions

## Description

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## Tags:

Alternate Exterior Angles Theorem
Alternate Interior Angles Theorem
angles
(18 more)
CK.MAT.ENG.SE.1.Geometry-Basic.3
CK.MAT.ENG.SE.2.Geometry.3
coordinate plane
Corresponding Angles Postulate
distance formula
equations of lines
Lines
Parallel Line Postulate
Parallel Lines
Perpendicular Line Postulate
perpendicular lines
planes
proofs
proving parallel lines
Same Side Interior Angles Theorem
slopes
the Distance Formula
transversals

## Categories:

## Date Created:

Feb 22, 2012## Last Modified:

Dec 13, 2013
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