Amourning dove can reach speeds up to 35 miles per hour. how fast is this in feet per hour

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

Me because some of question i don’t understand

The lengths of all sides of a triangle are integers when measured in decimeters. one of the sides has length of 1 dm and another of 3 dm. find the perimeter of the triangle.'