Question

difference between dendtretic and trellis drainage patterns

Answer 1

Trellis drainage patterns look similar to their namesake, the common gardentrellis. Trellis drainage develops in folded topography. Down-turned folds called synclines form valleys in which resides the main channel of the stream. The rectangular drainage pattern is found in regions that have undergone faulting.

Answer 2

Dendritic pattern for my tree like structures the rivers and its tributaries make acute angles with each other

Trellis  patterns the rivers and tributaries are at 90° right angles from each other