Three friends are riding bicycles in a race. Mark is 0.4 miles behind Robert. Bill is 1.7 miles ahead from Mark. If Robert has ridden 7.5 miles, how far has bill ridden ?

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)

step-by-step explanation :

we know that

the measurement of the outer angle is the semi-difference of the arcs which comprises

in this problem

m< xzy is the outer angle

substitute the values

the measure of angle xoy is equal to

> by central angle

substitute the value

sorry i really don't know what tiles and steps you are referring to

step-by-step explanation: