Triangle Angle Sum - Activity B


Measure the angles of a triangle and find the sum. Then reshape and resize the triangle and confirm that the sum of angle measures is the same for all triangles.

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Assessment Questions (4):

  1. In triangleABC, if mangleA = 100° and mangleB = 50°, what is mangleC?
  2. Which of the following are the correct angle measures for angles 1 and 2 in the triangle shown below?

    Triangle with an angle measuring 58 degrees and an angle measuring 79 degrees.
  3. Classify an equiangular triangle by its angles.
  4. Given triangleABC, with mangleB = 37° and mangleC = 49°, which of the following descriptions of the triangle are true?

    I. acute     II. scalene     III. obtuse     IV. right     V. isosceles

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