Doserve the pattern of the following sequence, and then answer question 11
-10, +20, -- 40, +80, a
11.
the value of a is
a. +160
b. -50
c. -70
d. - 160

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?