What undefined term is used to define a circle?

The graph of a line gets what as the value of the slope gets bigger

If the measure of xyz is 81 what is the measure of yz

Tamera puts 15/4 gallons of gasoline in her car. which mixed number represents the gallons of gasoline? a) 2 3/4 gallons b) 3 1/4 gallons c) 3 3/4 gallons d) 4 1/2 gallons answer it's worth a lot of points!