Explain it

triangle-proofs-workshop β€” 1 short write-up

A checkpoint, not a test

Explain the shared-side proof

A few sentences are enough. This is portal practice, not a Canvas grade.

Triangle ABC with vertex A above base BC. AB and AC have matching tick marks. AD bisects angle BAC, meeting BC at D. The two angles at A have matching arcs.
In triangle ABC, AB β‰… AC. AD bisects ∠BAC and D lies on BC. Explain how to prove Ξ”BAD β‰… Ξ”CAD, then explain why the base angles at B and C match. Name the reason for the shared side and the order in which you use SAS and CPCTC.

Build the evidence for SAS before using corresponding parts.