Finding Missing Angles of a Triangle

Finding Missing Angles of a Triangle

with variables

Properties of Triangles

• The sum of all the angles in a triangle is 180 degrees

• An exterior angle of a triangle is equal to the sum of its two interior opposite angles

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What is the measure of the missing angle?

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What is the measure of angle x?

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Solve for x.

Multiple Choice

Choose a correct equation to find x.

• 4x - 2 + 12x + 1 = 75

• 4x - 2 + 75 = 12x + 1

• 4x - 2 + 75 + 12x + 1 = 180

• 4x - 2 - 75

Multiple Choice

What is the measure of angle b?

• 36^o

• 36

• 36 degrees

Multiple Choice

Which of the following terms best describes Angle d?

• Remote interior angle
• Corresponding angle
• Exterior angle
• Interior angle

Multiple Choice

Solve for x

• 65

• 65 degrees

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Solve for x

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Find the measure of the angle indicated.

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What do the Angles of a Triangle equal?

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Find the measure of the indicated angle.