1. Parallel Lines & Transversals

2. Activator Problem Solution: m<1 = 60o. (given)
m<3 = m<5 =m<7 =60o
m<2, m<4, m<6, m<8 = 120o.

3. Perpendicular and Parallel Lines
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4. Congruent Angles

5. More Definitions
Perpendicular lines are lines that intersect at right angles.
Parallel lines are lines that never intersect.
A transversal is a line that intersects two or more lines.

6. Special Types of Angles
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7. Vertical Angles

8. Corresponding Angles

9. Alternate Interior Angles

10. Summary Parallel lines are lines that never meet.
Perpendicular lines meet at right angles.
A transversal is a line that intersects 2 or more (parallel) lines.
Parallel lines cut by a transversal form 8 angles.
Pairs of angles will be either congruent or supplementary.
Special pairs of angles will be congruent.
Vertical angles
Corresponding angles
Alternate Interior Angles
Interactive math dictionary

11. Find the measure of the other angles.
Your turn!
Find the measure of the other angles.
105o

12. Try this one! Solve for a, b, c, d, x, y and z x 65o a - 10 b 5c

13. More special angles… Sources http://www.mathsisfun.com
Sources l