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Warm - Up
Solve the equations:
1. (1/2)x - 7 = 14 2. 2x - 9 = 5x + 15
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1.1 Identify Points, Lines, and Planes
There are three types of geometric objects in the picture below. Can you find them?
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A
AB or BA
M, ABC, CAB or BAC
AB or BA
AB
BA
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CAN YOU FIND THE VOCABULARY WORD THIS DEFINITION BELONGS TO???
Has no dimension. Represented by a dot.
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CAN YOU FIND THE VOCABULARY WORD THIS DEFINITION BELONGS TO???
Has one dimension. Extends without end on both sides.
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CAN YOU FIND THE VOCABULARY WORD THIS DEFINITION BELONGS TO???
Two dimensions. Extends without end.Contains 3 or more points.
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These 3 words, point, line and plane, are what we call undefined terms in geometry. They do not have formal definitions but we agree upon what they mean.
UNDEFINED TERMS!!!
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CAN YOU FIND THE VOCABULARY WORD THIS DEFINITION BELONGS TO???
Consists of endpoints. Has finite length. We label it by its endpoints.
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CAN YOU FIND THE VOCABULARY WORD THIS DEFINITION BELONGS TO???
Starts at a point and stretches out to infinity.
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CAN YOU FIND THE VOCABULARY WORD THIS DEFINITION BELONGS TO???
Two rays that share a common endpoint and stretch out into opposite directions.
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CAN YOU FIND THE VOCABULARY WORD THIS DEFINITION BELONGS TO???
Points that lie on the same line.
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CAN YOU FIND THE VOCABULARY WORD THIS DEFINITION BELONGS TO???
Points that lie in the same plane.
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CAN YOU FIND THE VOCABULARY WORD THIS DEFINITION BELONGS TO???
Set of points the figures have in common.
CASE 1: CASE 2: CASE 3:
2 lines intersect @ 1 point A point and line intersect @ 1 point 2 planes intersect @ 1 line
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IDENTIFY
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Give another name for PR.
Name all rays with endpoint Q.
Circle the rays that are opposite rays.
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CLASSWORK