I estimated that the repairs to my car would cost $80. In fact, they cost $120. What was the percentage error?

In δabc, m∠acb = 90°, cd ⊥ ab and m∠acd = 45°. find: a find cd, if bc = 3 in

The given diagram shows the parts of a right triangle with an altitude to the hypotenuse. using the two given  measures, find the other four.

Cody ran nine miles on his first day of training. the next day he ran 1/8 that distance. how far did he run the second day?