Write a two column proof. Given: RU II ST; LR = LTProve: RS UT

The blue line is a transversal. a. Name four pairs of corresponding angles. b. Name two pairs of alternate interior angles. c. Name two pairs of same-side interior angles. d. Name two pairs of angles that could be called alternate exterior angles. e. Name two pairs of angles that could be called same-side exterior angles.

Classify each pair of angles as alternate interior angles, same-side interior angles, corresponding angles, or none of these. Z. 7 and Z. 1 1

Classify each pair of angles as alternate interior angles, same-side interior angles, corresponding angles, or none of these. Z. 14 and Z. 16

Classify each pair of angles as alternate interior angles, same-side interior angles, corresponding angles, or none of these. Z.4 and L 10

Classify each pair of angles as alternate interior angles, same-side interior angles, corresponding angles, or none of these. Z.3 and Z. 6

Classify each pair of angles as alternate interior angles, same-side interior angles, corresponding angles, or none of these. Z. 6 and Z. 1

Classify each pair of angles as alternate interior angles, same-side interior angles, corresponding angles, or none of these. Z. 2 and Z. 10

Classify each pair of angles as alternate interior angles, same-side interior angles, corresponding angles, or none of these. L 2 and Z. 3

Classify each pair of angles as alternate interior angles, same-side interior angles, corresponding angles, or none of these. Z_ 7 and L 12

Classify each pair of lines as intersecting, parallel, or skew a. AB and EJ b. AB and Ftf c. AB and /D d. EF and /// e. F and NM f. OV and FG

Name six lines parallel to GL.

Name several lines skew to GL.

Name five lines parallel to plane ABCD.

Name two coplanar segments that do not intersect and yet are not parallel.

Complete each statement with the word always, sometimes, or never. Two skew lines are _2_ parallel.

Complete each statement with the word always, sometimes, or never. Two parallel lines are _L_ coplanar.

Complete each statement with the word always, sometimes, or never. A line in the plane of the ceiling and a line in the plane of the floor are ? parallel.

Complete each statement with the word always, sometimes, or never. Two lines in the plane of the floor are _L_ skew.

Complete each statement with the word always, sometimes, or never. A line in the plane of a wall and a line in the plane of the floor are a. ? parallel. b. ? intersecting. c. skew.

In Exercises 18-20 use two lines of notebook paper as parallel lines and draw any transversal. Use a protractor to measure. Measure one pair of same-side interior angles. Repeat the experiment with another transversal. What appears to be true?

Draw a large diagram showing three transversals intersecting two nonparallel lines / and n. Number three pairs of sameside interior angles on the same sides of the transversals, as shown in the diagram. a. Find m Z 1 -I- m Z 2. b. Find m 1.3 + mL4. c. Predict the value of m Z 5 + mZ6. Then check your prediction by measuring. d. What do you conclude?

Draw a diagram of a six-sided box by following the steps below. Top Bottom F si vE

Exercises 23-29 refer to the diagram in Step 2 of Exercise 22. Name five lines that appear to be parallel to AG.

Exercises 23-29 refer to the diagram in Step 2 of Exercise 22. Name three lines that appear to be parallel to AB.

Exercises 23-29 refer to the diagram in Step 2 of Exercise 22. Name four lines that appear to be skew to AB.

Exercises 23-29 refer to the diagram in Step 2 of Exercise 22. Name two planes parallel to AF.

Exercises 23-29 refer to the diagram in Step 2 of Exercise 22. Name four planes parallel to FL.

Exercises 23-29 refer to the diagram in Step 2 of Exercise 22. How many pairs of parallel planes are shown?

Exercises 23-29 refer to the diagram in Step 2 of Exercise 22. Suppose the top and bottom of the box lie in parallel planes. Explain how Theorem 3-1 can be used to prove CD II IJ

Complete each statement with the word always, sometimes, or never. When there is a transversal of two lines, the three lines are ? coplanar.

Complete each statement with the word always, sometimes, or never. Three lines intersecting in one point are L_ coplanar.

Complete each statement with the word always, sometimes, or never. Two lines that are not coplanar L_ intersect.

Complete each statement with the word always, sometimes, or never. Two lines parallel to a third line are L_ parallel to each other.

Complete each statement with the word always, sometimes, or never. Two lines skew to a third line are :_ skew to each other.

Complete each statement with the word always, sometimes, or never. Two lines perpendicular to a third line are !_ perpendicular to each other.

Complete each statement with the word always, sometimes, or never. Two planes parallel to the same line are L_ parallel to each other.

Complete each statement with the word always, sometimes, or never. Two planes parallel to the same plane are L_ parallel to each other.

Complete each statement with the word always, sometimes, or never. Lines in two parallel planes are L_ parallel to each other.

Complete each statement with the word always, sometimes, or never. Two lines parallel to the same plane are L_ parallel to each other.

Draw each figure described. Lines a and b are skew, lines b and c are skew, and a II c.

Draw each figure described. Lines d and e are skew, lines e and /are skew, and d f.

Draw each figure described. Line / II plane X. plane X 'I plane Y. and / is not parallel to Y.

Complete. In an octagon the sum of the measures of the interior angles is

Complete. In an octagon the sum of the measures of the interior angles is

Write a two column proof. Given: WX XY; Z_ 1 is comp. to Z.3. Prove: L 2 = L 3

Write a two column proof. Given: RU II ST; LR = LT Prove: RS UT