Parallel Lines & Transversals

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Presentation transcript:

Parallel Lines & Transversals

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

Perpendicular and Parallel Lines BrainPop MOVIE click here Mr. Vaugh’s flash movie click here

Congruent Angles

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.

Special Types of Angles Click here to interact:

Vertical Angles

Corresponding Angles

Alternate Interior Angles

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

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

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

More special angles… Sources http://www.mathsisfun.com http://www.shodor.org/interactivate/activities Sources http://www.mathsisfun.com http://www.algebra.com http://www.teachers.ash.org.au/jeather/maths/dictionary.htm l

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