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IM 8.1.15 Practice: Adding the Angles in a Triangle

Author:GeoGebra Classroom Activities, IM 6 – 8 Math

In triangle , the measure of angle is . Give possible measures for angles and if triangle is isosceles.

Give possible measures for angles and if triangle is right.

For the following sets of angles, decide if there is a triangle whose angles have these measures in degrees. If you get stuck, consider making a line segment. Then use a protractor to measure angles with the first two angle measures.

60, 60, 60

Select all that apply
  • A
  • B
Check my answer (3)

90, 90, 45

Select all that apply
  • A
  • B
Check my answer (3)

30, 40, 50

Select all that apply
  • A
  • B
Check my answer (3)

90, 45, 45

Select all that apply
  • A
  • B
Check my answer (3)

120, 30, 30

Select all that apply
  • A
  • B
Check my answer (3)

Angle in triangle is obtuse. Can angle or angle be obtuse?

Select all that apply
  • A
  • B
Check my answer (3)

Explain your reasoning.

Describe the transformation that could be applied to Polygon A to get Polygon B.

Describe the transformation performed above.

Describe the transformation that could be applied to Polygon A to get Polygon B.

Describe the transformation performed above.

Describe the transformation that could be applied to Polygon A to get Polygon B.

Describe the transformation performed above.

On the grid, draw a scaled copy of quadrilateral ABCD using a scale factor of 1/2.

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