1. Splash Screen

2. Key Concept: Undefined Terms Example 1: Name Lines and Planes
Five-Minute Check
CCSS
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
Lesson Menu

3. What is the value of x2 + 3yz if x = 3, y = 6, and z = 4?
B. 33
C. 72
D. 81
5-Minute Check 1

4. Solve 2(x – 7) = 5x + 4.
A. –6 B.
C. 2
D. 6
5-Minute Check 2

5. Which is a solution of 3x + 4y = 14?
B. (–2, 5)
C. (1, 3)
D. (2, 3)
5-Minute Check 3

6. Factor 9x2 – 25y2. A. (3x – 5y)2 B. (3x + 5y)2 C. (3x + 5y)(3x – 5y)
D. (9x + 5y)(x – 5y)
5-Minute Check 4

7. Graph y = 3x + 2.
A. B.
C. D.
5-Minute Check 5

8. You used basic geometric concepts and properties to solve problems.
Identify and model points, lines, and planes.
Identify intersecting lines and planes.
Then/Now

9. undefined term definition defined term space point line plane
collinear
coplanar
intersection
Vocabulary

10. Concept

11. A. Use the figure to name a line containing point K.
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.
Example 1

12. A. Use the figure to name a line containing the point X.
A. line X
B. line c
C. line Z D.
Example 1a

13. B. Name the geometric shape modeled by a button on a table.
Model Points, Lines, and Planes
B. Name the geometric shape modeled by a button on a table.
Answer: The button on the table models a point on a plane.
Example 2

14. A. Name the geometric shape modeled by a colored dot on a map used to mark the location of a city.
A. point
B. line segment
C. plane
D. none of the above
Example 2a

15. A. Choose the best diagram for the given relationship
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.
A. B C. D.
Example 3a

16. A. How many planes appear in this figure?
Interpret Drawings
A. How many planes appear in this figure?
Answer: There are two planes: plane S and plane ABC.
Example 4

17. B. Name three points that are collinear.
Interpret Drawings
B. Name three points that are collinear.
Answer: Points A, B, and D are collinear.
Example 4

18. C. Are points A, B, C, and D coplanar? Explain.
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.
Example 4

19. Answer: The two lines intersect at point A.
Interpret Drawings
Answer: The two lines intersect at point A.
Example 4

20. A. How many planes appear in this figure?
A. one
B. two
C. three
D. four
Example 4a

21. B. Name three points that are collinear.
A. B, O, and X
B. X, O, and N
C. R, O, and B
D. A, X, and Z
Example 4b

22. C. Are points X, O, and R coplanar?
A. yes
B. no
C. cannot be determined
Example 4c

23. A. point X
B. point N
C. point R
D. point A
Example 4d