If AD=8 and BD=4, what is the length of DC⎯⎯⎯⎯⎯⎯? The figure shows right triangle C A B with altitude A D to hypotenuse B C.

DC = 4
DC = 20
DC = 8
DC = 16

Which of the following correctly justifies statement four of the two column proof? a. corresponding angles theorem b. transitive property of equality c. vertical angle theorem d. substitution property of equality

Point r divides in the ratio 1 : 5. if the coordinates of e and f are (4, 8) and (11, 4), respectively, what are the coordinates of r to two decimal places?

Can anyone explain to me how to do this? anything will .