7.
a. Yes, points A, C, and E are coplanar.
b. The three lines are line AB, line CD, and line EF.
c. Three collinear points are A, B, and C.
d. The intersection of line AB and line CD is point E.
8.
a. There are 6 planes in the diagram.
b. The planes are plane ABCD, plane ABFE, plane DCGH, plane ADHE, plane BCGF, and plane EFGH.
c. Six coplanar points are A, B, C, D, E, and F (all lie on plane ABCD or plane ABFE).
d. Four non-coplanar points are A, C, G, and H.
9.
a. There are 2 planes in the diagram.
b. The planes are plane W and plane ABC.
c. Yes, planes W and ABC are different planes.
d. Three collinear points are A, B, and C.
10. Point B on PQ: Place point B anywhere on segment PQ.
11. Plane J containing line s: Draw a flat surface (plane) that includes the entire line s.
12. Lines r and t intersect at pt Z: Draw two lines crossing each other at point Z.
13. JK intersects CD, with point Y not on either line: Draw segments JK and CD crossing at some point; place point Y somewhere off both segments.
14. Planes M and N intersect at RS: Draw two planes intersecting along a line labeled RS.
Parent Tip: Review the logic above to help your child master the concept of geometry lines worksheet.
