GO OVER CHAPTER 2 TEST

3.1 PROPERTIES OF PARALLEL LINES10/21

Learning Target• I can identify angles formed by parallel lines and a

transversal.• I can use properties of parallel lines to find missing angles

.

Vocab

Transversal: a line that intersects two coplanar lines at two distinct points

• Corresponding Angles Postulate

If a transversal intersects two parallel lines, then corresponding angles are congruent

Corresponding Angles(angles in the same spot on their respected line)

• Alternate Interior Angles Theorem

If a transversal intersects two parallel lines, then alternate interior angles are congruent

Alternate Interior Angles(inside the parallel lines, but on different sides of the transversal)

• Same Side Interior Angles Theorem

If a transversal intersects two parallel lines, then same side interior angles are supplementary

Same Side Interior Angles(inside the parallel lines but on the same side of the transversal)

Naming Angles

Line CD || Line EF; Name a pair of: • Vertical Angles, • Adjacent Angles, • Supplementary Angles, • Alternate Interior Angles, • Corresponding Angles, and • Same Side Interior Angles.

Identifying Angle Relationships • Name the relationship between the angle pairs• 1 and 6• 2 and 10• 10 and 15• 7 and 11• 12 and 15• 2 and 7• 10 and 11• 5 and 7

• If the measure of angle 3 is 117• Find the measure

of the remaining

angles and justify

your answers

with reasons

• The measure of angle 9 is 72, find the rest of the angle

measures

Solve for u, v, x, y, and z(be able to justify your answers with the angle relationships)

• The different ways you might see parallel lines

• You need to be aware that parallel line relationships exist wherever you see parallel lines. This could be in shapes, too.

•Homework

In your packet, do 3-1 all