If you are unable to post a picture of the triangle, can you describe it to us? Then we can help you with finding the measure of the angle in both radians and degrees.
Mrs. Smith donated $20 The constant proportionality is $1 because no matter what, Mrs. smith will donate $1 for each mile. So if Sam were to only walk 1 mile, mrs. smith would donate $1. Or seen as a 1:1 proportion.
