Emergency.

in the figure below, angle dec is congruent to angle dce, angle b is congruent to angle f, and line df is congruent to line bd. point c is the point of intersection between line and ag and line bd while point e is the point of intersection between line ag and line df.

prove triangle abc is congruent to triangle gfe.

i need a two-column proof.

i have no idea where to start!

Find the value of tan theta if sin theta = 12/13 and theta is in quadrant 2

Asurvey of 2,000 doctors showed that an average of 3 out of 5 doctors use brand x aspirin.how many doctors use brand x aspirin

Exclude leap years from the following calculations. (a) compute the probability that a randomly selected person does not have a birthday on october 4. (type an integer or a decimal rounded to three decimal places as needed.) (b) compute the probability that a randomly selected person does not have a birthday on the 1st day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (c) compute the probability that a randomly selected person does not have a birthday on the 30th day of a month. (type an integer or a decimal rounded to three decimal places as needed.) (d) compute the probability that a randomly selected person was not born in january. (type an integer or a decimal rounded to three decimal places as needed.)