Page 73 - Math Course 1 (Book 2)
P. 73
Introduction to Geometry
MO. 9 - L1c Your Turn!
Interpreting Points, Lines, and Interpret Drawings
Planes in a Figure
Let’s Begin
Interpret Drawings
Examples
A. How many planes appear in this f gure?
A. one B. two
C. three D. four
Answer
A. How many planes appear in this f gure?
B. Name three points that are collinear.
There are two planes:
Answer A. B, O, and X B. X, O, and N
plane S and plane ABC.
C. R, O, and B D. A, X, and Z
B. Name three points that are collinear. Answer
C. Are point X, O, and R coplanar?
Points A, B, and D are
Answer
collinear. A. yes B. no
C. cannot be determined
C. Are points A, B, C, and D coplanar? Explain.
Answer
Points A, B, C, and D all lie
↔
↔
Answer in plane ABC, so they are D. At what point do BN and XO intersect?
coplanar.
↔ ↔ A. point X B. point N
D. At what point do DB and CA intersect? C. point R D. point A
Answer
The two lines intersect at
Answer
point A.
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