Question

what do the \tick\ marks on a triangle mean? (see yellow highlighted portion). (if unsure, double check engageli notes in the playback room) angles are congruent angles are right sides are congruent sides make a vertex

Explanation:

In geometry, tick marks on a triangle's sides indicate that the sides are of equal length, which means they are congruent. Tick marks on angles would indicate congruent angles, but here the marks are on sides.

Answer:

Sides are Congruent