Chapter 3: Q31 (page 77)
Complete each statement with the word always, sometimes, or never.
Three lines intersecting in one point are coplanar
Short Answer
Three lines intersecting in one point are sometimes coplanar.
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Chapter 3: Q31 (page 77)
Complete each statement with the word always, sometimes, or never.
Three lines intersecting in one point are coplanar
Three lines intersecting in one point are sometimes coplanar.
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Plane X is parallel to plane Y. If plane Z intersects X in line l and Y in line n, then l is parallel to n.
Name two coplanar segments that do not intersect and yet are not parallel.
The cover of a soccer ball consists of interlocking regular pentagons and regular hexagons, as shown at the right. The second diagram shows that regular pentagons and hexagons cannot be interlocked in this pattern to tile a floor. Why not?

In each exercise some information is given. Use this information to name the segments that must be parallel. If there are no such segments, say so.

Complete the table for regular polygons.

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