Are the following triangles congruent? If yes, state the

triangle congruence postulate, and identify the

congruent triangles.

Bell Ringer

Identify three sets of parallel lines in the classroom.

Parallel lines Lines in the same plane that do not intersect

A line that intersects two or more lines in the same plane.What is a

transversal?

Congruent angles Two angles that have the

same measure

Topic: Angles

Complementary angles

Two angles whose measures have a sum of 90 degrees

Supplementary angles

Two angles whose measures have a sum of 180 degrees<A + <B = 180

<1 + <2 = 90

Vertical angles

Exterior angle

Angles that are opposite each other when two lines intersect.

< 1 and < 4<6 and <5

When the sides of a triangle are extended, the angle that is adjacent to the interior angle

Find the measure of angles 1-8, if m<2 = 100 degrees and m<5 = 50 degrees

Finding angle measures

Find the measure of angles 1-8 given m< 2 = 85 and m< 6 = 85

Nonadjacent interior angles that lie on opposite sides of a transversal

Alternate interior angles

<3 and <6

<4 and <5

Corresponding angles are the angle pairs that are in the same position and same side of the transversal.

Corresponding angles

<1 and <5<3 and <7

<2 and <6<4 and <8

Vertical angles Vertical angles are the angles that are opposite each other when two lines intersect

<3 and <2<1 and <4

<5 and <8<7 and <6

Consecutive anglesAre the angle pairs that are on the insides of the two lines (the interior) and on the same side of the transversal.

<3 and <5 <4 and <6

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