Beth drives 200 miles in 4 hours. She drives the first 18 miles at an average speed of 36 mph
Work out her average speed for the rest of the journey.

In the diagram, the ratios of two pairs of corresponding sides are equal to prove that almn - axyz by the sas similarity theorem, it also needs to be shown that x 6 z un z zz un = 2x zləzz lezy