Find unknown angle measures of triangles

If you draw several triangles and carefully measure each angle with a protractor, you will find that the sum of the angle measures of each triangle is 180°

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Questions #: 6
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The sum of the angle measures of any triangle is 180°

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In the figure, find x

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40° x

\(x\) = (1)

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Find the measure of each angle

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In the figure, find the measure of each angle of △ABC

B C A x 2x x + 32°

 

  1. m(△ABC) = (1)
  2. m(△BAC) = (2)
  3. m(△BCA) = (3)

 

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If one base angle of an isosceles triangle measures 70°, what is the measure of the vertex angle?

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Diagram

\(x\) = (1)°

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If the vertex angle of an isosceles triangle measures 99°, what are the measures of the base angles?

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Diagram

\(x\) = (1)°

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If the vertex angle of an isosceles triangle measures 57°, what are the measures of the base angles?

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Answer = (1)°

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Keywords
Year 6