splash screen. lesson menu five-minute check then/now new vocabulary key concept: undefined terms...
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Five-Minute Check
Then/Now
New Vocabulary
Key Concept: Undefined Terms
Example 1: Name Lines and Planes
Example 2: Real-World Example: Model Points, Lines, and Planes
Example 3: Draw Geometric Figures
Example 4: Interpret Drawings
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A. A
B. B
C. C
D. D A B C D
0% 0%0%0%
A. 27
B. 33
C. 72
D. 81
What is the value of x2 + 3yz if x = 3, y = 6, and z = 4?
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A. A
B. B
C. C
D. D A B C D
0% 0%0%0%
Solve 2(x – 7) = 5x + 4.
A. –6
B.
C. 2
D. 6
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A. A
B. B
C. C
D. D A B C D
0% 0%0%0%
A. (–3, 4)
B. (–2, 5)
C. (1, 3)
D. (2, 3)
Which is a solution of 3x + 4y = 14?
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A. A
B. B
C. C
D. D A B C D
0% 0%0%0%
A. (3x – 5y)2
B. (3x + 5y)2
C. (3x + 5y)(3x – 5y)
D. (9x + 5y)(x – 5y)
Factor 9x2 – 25y2.
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A. A
B. B
C. C
D. D A B C D
0% 0%0%0%
Graph y = 3x + 2.
A. B.
C. D.
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A. A
B. B
C. C
D. D A B C D
0% 0%0%0%
A. 4x = 2
B. 5x + 2y = 13
C. 6x2 – 3x = 16
D. 5x3 – x2 + 2 = 0
Which of the following equations is a quadratic equation?
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You used basic geometric concepts and properties to solve problems.
• Identify and model points, lines, and planes.
• Identify intersecting lines and planes.
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• undefined term
• point
• line
• plane
• collinear
• coplanar
• intersection
• definition
• defined term
• space
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Name Lines and Planes
A. Use the figure to name a line containing point K.
Answer: The line can be named as line a.There are three points on the line. Any two of the points can be used to name the line.
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Name Lines and Planes
B. Use the figure to name a plane containing point L.
You can also use the letters of any three noncollinear points to name the plane.plane JKM plane KLM plane JLM
Answer: The plane can be named as plane B.
The letters of each of these names can be reordered to create other acceptable names for this plane. For example, JKM can also be written as JMK, MKJ, KJM, KMJ, and MJK. There are 15 different three-letter names for this plane.
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A. A
B. B
C. C
D. D A B C D
0% 0%0%0%
A. Use the figure to name a line containing the point X.
A. line X
B. line c
C. line Z
D.
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A. A
B. B
C. C
D. D A B C D
0% 0%0%0%
B. Use the figure to name a plane containing point Z.
A. plane XY
B. plane c
C. plane XQY
D. plane P
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Model Points, Lines, and Planes
A. Name the geometric shape modeled by a 10 12 patio.
Answer: The patio models a plane.
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Model Points, Lines, and Planes
B. Name the geometric shape modeled by a water glass on a table.
Answer: The glass on the table models a point on a plane.
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A. A
B. B
C. C
D. D A B C D
0% 0%0%0%
A. point
B. line segment
C. plane
D. none of the above
A. Name the geometric shape modeled by a colored dot on a map used to mark the location of a city.
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A. A
B. B
C. C
D. D A B C D
0% 0%0%0%
A. point
B. line segment
C. plane
D. none of the above
B. Name the geometric shape modeled by the ceiling of your classroom.
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Draw Geometric Figures
Draw a surface to represent plane R and label it.
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Draw Geometric Figures
Draw a line anywhere on the plane.
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Draw Geometric Figures
Draw dots on the line for point A and B. Label the points.
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Draw Geometric Figures
Draw dots on this line for point D and E. Label the points.
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Draw Geometric Figures
Label the intersection point of the two lines as P.
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Draw Geometric Figures
There are an infinite number of points that are collinear with Q and R. In the graph, one such point is T(1, 0).
Answer:
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A. B.
C. D.
A. A
B. B
C. C
D. D A B C D
0% 0%0%0%
A. Choose the best diagram for the given relationship. Plane D contains line a, line m, and line t, with all three lines intersecting at point Z. Also point F is on plane D and is not collinear with any of the three given lines.
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Interpret Drawings
A. How many planes appear in this figure?
Answer: There are two planes: plane S and plane ABC.
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Interpret Drawings
B. Name three points that are collinear.
Answer: Points A, B, and D are collinear.
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Interpret Drawings
C. Are points A, B, C, and D coplanar? Explain.
Answer: Points A, B, C, and D all lie in plane ABC, so they are coplanar.
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Interpret Drawings
Answer: The two lines intersect at point A.
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A. A
B. B
C. C
D. D A B C D
0% 0%0%0%
A. one
B. two
C. three
D. four
A. How many planes appear in this figure?
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A. A
B. B
C. C
D. D A B C D
0% 0%0%0%
A. B, O, and X
B. X, O, and N
C. R, O, and B
D. A, X, and Z
B. Name three points that are collinear.
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A. A
B. B
C. C
A. yes
B. no
C. cannot be determined
C. Are point X, O, and R coplanar?
A B C
0% 0%0%
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A. A
B. B
C. C
D. D A B C D
0% 0%0%0%
A. point X
B. point N
C. point R
D. point A
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