Interior angles of a Triangle

Interior angles of a Triangle

• The angles inside a polygon are

  called interior angles.

• When the

  sides of a polygon are extended,

  other angles are formed. The angles

  outside the polygon that are

  adjacent to the interior angles

  are called exterior angles.

Interior Angle Measures of a Triangle

• The sum of the interior angle

  measures of a triangle is 180°.

• x + y + z = 180

Find the value of x

Multiple Choice

In a triangle, how many total degrees are there?

• 100%
• 180 degrees
• it varies
• 360 degrees

Multiple Choice

Find the measure of the indicated angle. 

• 95
• 85
• 35
• 45

Find the value of x

Multiple Choice

Solve for x.

• -11

• -12

• -6

• 11

Exterior Angle Measures of a Triangle

• The measure of an exterior angle

  of a triangle is equal to the sum

  of the measures of the two

  nonadjacent interior angles.

• z = x + y

Find the value of x

Find the value of a

Multiple Choice

Which of the following terms best describes Angle d?

• Remote interior angle

• Corresponding angle

• Exterior angle

• Interior angle

Multiple Choice

What is the measure of angle b?

• 36^o

• 56^o

• 63^o

• 117^o

Multiple Choice

Which of the following angles can you add together to equal angle d?

• Angle a and Angle b

• Angle b and Angle c

• Angle a and Angle c

• Angle a and Angle b and Angle c