Geometry Sections 1.2 & 2.1 The Building Blocks of Geometry.
8-1 Building Blocks of Geometry Learn to describe figures by using the terms of geometry.
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8-1 Building Blocks of Geometry Learn to describe figures by using the terms of geometry.
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Transcript of 8-1 Building Blocks of Geometry Learn to describe figures by using the terms of geometry.
8-1 Building Blocks of Geometry
Learn to describe figures by using the terms of geometry.
8-1 Building Blocks of Geometry
Vocabulary
pointlineplaneline segmentray
8-1 Building Blocks of Geometry
The building blocks of geometry are points, lines, and planes.
8-1 Building Blocks of Geometry
Additional Example 1: Identifying Points, Lines, and Planes
Use the diagram to name the geometric figure.
A. three pointsM, N, and PFive points are labeled: points M, N, P, Q, and R.
B. two lines
PR and NR
You can also write RP and RN.
8-1 Building Blocks of Geometry
Additional Example 1: Identifying Points, Lines, and Planes
Use the diagram to name the geometric figure.
C. a point shared by two linespoint R
D. a plane
plane QRMUse any three points in the plane that are not on the same line. Write the three points in any order.
Point R is a point on PR and NR.
8-1 Building Blocks of Geometry
Check It Out: Example 1
Use the diagram to name the geometric figure.
A. three pointsS, T, and UFive points are labeled: points S, T, U, V, and W.
B. two lines
UW and SW
You can also write WU and WS.
V
S
U
WT
8-1 Building Blocks of Geometry
Check It Out: Example 1
Use the diagram to name the geometric figure.
C. a point shared by two linespoint W
D. a plane
plane VUTUse any three points in the plane that are not on the same line. Write the three points in any order.
Point W is a point on WS and WU. V
S
U
WT
8-1 Building Blocks of Geometry
8-1 Building Blocks of Geometry
Additional Example 2: Identifying Line Segments and Rays
Use the diagram to give a possible name to the figure.
A. three different line segments
B. three ways to name the line
You can also write BA, CB, and CA.
AB, BC, and ACYou can also write BA, CB, and CA.
AB, BC, and AC C
A B
8-1 Building Blocks of Geometry
Additional Example 2: Identifying Line Segments and Rays
Use the diagram to give a possible name to the figure.
C. six rays
D. another name for ray AB
A is still the endpoint. C is another point on the ray.
AB, AC, BC, CB,
CA, and BA
AC
C
A B
8-1 Building Blocks of Geometry
Check It Out: Example 2
Use the diagram to give a possible name to the figure.
A. three different line segments
B. three ways to name the line
You can also write ED, FE, and FD.
DE, EF, and DFYou can also write ED, FE, and FD.
DE, EF, and DFF
DE
8-1 Building Blocks of Geometry
Check It Out: Example 2
Use the diagram to give a possible name to the figure.
C. six rays
D. another name for ray DE
D is still the endpoint. F is another point on the ray.
DE, EF, DF, FE,
FD, and ED
DF
F
DE
8-1 Building Blocks of Geometry
Lesson Quiz
Use the diagram to name each geometric figure.
1. three points
2. two lines
3. a point shared by a line and a ray
4. a plane
Possible answer: A, B, C
Possible answer: F
Possible answer: plane AEC
Possible answer: AD, CE
