Sec: 3.5 Sol: G.2c  Interior angles  Exterior angles.

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Presentation transcript:

Sec: 3.5 Sol: G.2c

 Interior angles  Exterior angles

The sum of the measures of the interior angles of a triangle is 180°.

The measure of an exterior angle of a triangle is equal to the sum of the measures of the two remote interior angles Remote Interior Angles Exterior Angle

2x + 21 x xX x x 3x

x 3x +6 80

32° 36° z°y°x°46°

If two angles of a triangle are congruent to two angles of a second triangle, then the third angles of the triangles are congruent.

4.1 : The acute angles of a right triangle are complementary. 4.2 : There can be at most one right or obtuse angle in a triangle.

Classwork: WB pg , 14, 16, 17 Homework: pg , 17-21, 29, 32