Geometry Vocabulary Powerpoint hosted on

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1 Geometry Vocabulary Powerpoint hosted on www.worldofteaching.com
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2 What is Geometry? Geometry is the study of shapes
They studied Geometry in Ancient Mesopotamia & Ancient Egypt Geometry is important in the art and construction fields

3 Points An exact position or location

4 POINT A POINT is an exact location on a graph, shape or in “space”.
The Hershey Kiss is a POINT on the line ●

5 LINE A LINE goes in opposite directions and never, never, never ends.
Imagine if this Twizzler went on forever and ever and ever and ever and ever and ever

6 RAY A RAY is part of a line, but it has one endpoint and the other end keeps going. ● Raaaaaaaaaaaaaaaaaaaaaaaayyyyyyyyyyyyyyyyyyyyyyyyyyy Endpoint

7 ENDPOINT An ENDPOINT is a point at the end of a ray or line segment.

8 LINE SEGMENT A LINE SEGMENT is part of a ray or line.
It has two endpoints Line Segment Line ● ● Line ● Endpoints Ray

9 Lines and Rays LINE: A straight path extending in both directions with no endpoints LINE SEGMENT: A part of a line that includes two points, called endpoints, and all the points between them RAY: A part of a line, with one endpoint, that continues without end in one direction

10 VERTEX A VERTEX is a fancy name for “angle”
Two rays or lines that have the same endpoint make a VERTEX/angle VERTEX/angles are measured in “degrees” When two lines cross, they make vertex/angles The Corners of a square are its vertex/angles

11 CONGRUENT CONGRUENT means the “same”
CONGRUENT LINE SEGMENTS means two line segments are the same CONGRUENT Vertex/Angles means two angles are the same ● ● ● ● The Hershey & Crunch Bar are a Congruent size

12 VERTICAL LINE A VERTICAL LINE goes up & down
The candy bars are vertical

13 HORIZONTAL LINE A HORIZONTAL LINE goes “across” (left and right)
The candy bars are Horizontal

14 More about Lines INTERSECTING LINES: Lines that cross
PARALLEL LINES: Lines that never cross and are always the same distance apart

15 Perpendicular Lines Two lines that intersect to form four right angles

16 OPEN & CLOSED FIGURES A CLOSED FIGURE/SHAPE starts and ends at the same point. An OPEN FIGURE/SHAPE does NOT start and end at the same point. CLOSED OPEN Start Start ● ● ● End End

17 POLYGON A POLYGON is a “closed” shape
A POLYGON is made up of line segments that do not cross. The number of sides gives a POLYGON its name NOT POLYGON POLYGON

18 Angles The figure formed when two rays share the same endpoint
Acute Angle: An angle less than a right angle Obtuse Angle: An angle greater than a right angle Right Angle: An angle that forms a square corner

19 3 TYPES OF ANGLES ACUTE ANGLES are less than 90°

20 3 TYPES OF ANGLES RIGHT ANGLES measure exactly 90 °
The “square” symbol means 90’

21 Right Angle or Not? Not! Not! Right Angle Not! Right Angle Not!

22 3 TYPES OF ANGLES OBTUES ANGLES are greater than 90 ° but less than 180 °

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24 ANGLES When you “name” an angle. The vertex/angle “letter/number” goes in the center of the label B A C If I wanted to know the measurement of Angle A…I would ask:” What is the measurement for BAC?” (Notice A is in the center)