In a quadrilateral abcd, the diagonals intersect at point t. jasmine has used the alternate interior angles theorem to show that angle dac is congruent to angle bca and that angle adb is congruent to cbd.

which of the following can jasmine use prove that triangle atd is congruent to triangle ctb?

ab congruent to dc
ac congruent to db
da congruent to bc
ta congruent to tc

I've been working on this for a few days and i just don't understand, it's due in a few hours. you. the direction of a vector is defined as the angle of the vector in relation to a horizontal line. as a standard, this angle is measured counterclockwise from the positive x-axis. the direction or angle of v in the diagram is α. part a: how can you use trigonometric ratios to calculate the direction α of a general vector v = < x, y> similar to the diagram? part b suppose that vector v lies in quadrant ii, quadrant iii, or quadrant iv. how can you use trigonometric ratios to calculate the direction (i.e., angle) of the vector in each of these quadrants with respect to the positive x-axis? the angle between the vector and the positive x-axis will be greater than 90 degrees in each case. part c now try a numerical problem. what is the direction of the vector w = < -1, 6 > ?