Angles+&+Polygons





**﻿ LINES, RAYS AND ANGLES ** **A point  is a location in space. **

**A line is a collection of points along a straight path that goes on and on in opposite directions. A line has no endpoints. **

**A line segment is a part of a line having two endpoints. **

A **ray** is a part of a line with one endpoint and goes on and on in one direction... 

**Parallel lines** are lines that never intersect or cross one another.



<span style="background-color: #00ff00; font-family: Arial,Helvetica,sans-serif; font-size: 150%;">**Perpendicular lines** cross each other or intersect at right angles. <span style="font-family: Arial,Helvetica,sans-serif;">

<span style="font-family: Arial,Helvetica,sans-serif;">An **angle** is two lines that meet at an endpoint called a **vertex**. An angle can be named by the three letters that form it or by the letter that is at its vertex. An **acute** angle is one that measures less than 90 degrees with a protractor - that is how much the angle is open or the lines diverge from the vertex.

An **acute** angle has a measure of less than 90 degrees at it's opening as measured by a protractor.

<span style="font-family: Arial,Helvetica,sans-serif;">An **obtuse** angle has a measure of greater than 90 degrees at its opening as measured by a protractor.



<span style="font-family: Arial,Helvetica,sans-serif;"> <span style="font-family: Arial,Helvetica,sans-serif;">Two angles whose measure in degrees adds up to 180 degrees are **supplementary angles**. An angle of 180 degrees is a **straight angle** and looks exactly like a line. In the above picture, A and B are supplementary to one another. **Games for Lines & Angles** []

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**Games for Polygons & Quadrilaterals** []

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**Extra Practice Worksheets**

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