In the diagram, $EF\parallel BC$EF∥BC and $ED\parallel BA$ED∥BA. Find the unknown angle, giving reasons.

Find the unknown angles, giving reasons.

Find the unknown angle, giving reasons.

Outcomes

9P.MG3.02

Determine, through investigation using a variety of tools and describe the properties and relationships of the angles formed by parallel lines cut by a transversal, and apply the results to problems involving parallel lines