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GeoGebra

Angle Addition Postulate

Author:Doris Álvarez Quintero
Activity

Drag the points A, B, C and D in the sketch below

Determine whether the following statement is always, sometimes, or never true.

D is in the interior of ∠ABC

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

Determine whether the following statement is always, sometimes, or never

m∠ABD + m∠DBC = m∠ABC

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

If D is in the interior of ∠ABC , m∠ABC=123° and m∠ABD=55°. Find m∠CBD

Check my answer

If m∠ABD=130° and m∠ABC=50°. Find m∠DBC

Check my answer

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