Have your homework out when the bell rings. If you don’t know who the guy on the left is, then you have been missing out on all things good when it comes.

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Have your homework out when the bell rings. If you don’t know who the guy on the left is, then you have been missing out on all things good when it comes to the topic of teen television and I am truly sorry for you.

Properties of Triangles

Interior Angles Angles inside of a triangle.

The interior angles of a triangle add up to 180°

Interior Angles Angles inside of a triangle. m  A + m  B + m  C = 180°

Find the missing angle measure

60° 70° x°

25°

x° 66° 24°

x° 46°

x° x + 20° 130 °

6x° 3x°

Exterior Angles The angle outside of a triangle and is created by extending one leg X

angles B and C are called: Remote Interior Angles A A

m  A + m  B + m  C = 180° m  A + m  X = 180° m  A + m  X = m  A + m  B + m  C m  X = m  B + m  C - m  A + m  X = - m  A + m  B + m  C

m  X = m  B + m  C

Exterior Angle Sum of the Remote Interior Angles =

100°

Find the missing angle measures.

20° Find the missing angle measures. 60°

100° Find the missing angle measures. x° 3x°

3x + 6° Find the missing angle measures. 5x + 20° 7x - 76°

Homework Pg. 227 (4-7, 9-10, 19-20)