Find the value of each variable. For the circle, the dot represents the center.

A =

B =

C =

D =

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

Can someone tell me if this is perpendicular? !