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GeoGebra

1.06 Angle investigation

Author:Katie Acland
Diagram #1: Use the angle tool to measure angle BED: 1) Click on the angle tool. 2) Click on point B, then point E, then point D. You can move the points to change the measures of the angles.

What do you notice about the measure of angles CEA and BED in Diagram #1?

What key fact is represented in Diagram #1? Refer to the "Key Facts and Discoveries" document page 1.

Select all that apply
  • A
  • B
  • C
  • D
  • E
Check my answer (3)
Diagram #2: Use the angle tool to measures of angle BCE: 1) Click on the angle tool. 2) Click on the points in the order listed above. You can move the points to change the measures of the angles.

What is the sum of the measures of the angles in Diagram #2?

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

What key fact is represented in Diagram #2? Refer to the "Key Facts and Discoveries" document page 1.

Select all that apply
  • A
  • B
  • C
  • D
  • E
Check my answer (3)
Diagram #3: Use the angle tool to measures of angle DAB. 1) Click on the angle tool. 2) Click on the points in the order listed above. You can move the points to change the measures of the angles.

What is the sum of the measures of the angles in Diagram #3?

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

What key fact is represented in Diagram #3? Refer to the "Key Facts and Discoveries" document page 1.

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

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