Bc¯¯¯¯¯ is parallel to de¯¯¯¯¯. what is ab? enter your answer in the box. units an upside down triangle with vertices labeled as a, d, and e. side d e is the base and the bottom vertex is a. sides a d and a e contain midpoints b and c, respectively. a line segment is drawn from b to c parallel to the base. segment b d is labeled as 17. segment a c is labeled as 42. segment c e is labeled as 21.

I believe the answer is 34.

34

Step-by-step explanation:

The ratio of AB to BD will be the same as the ratio of AC to CE.

The ratio of AC to CE is 42/21.

AB is unknown.  Using the variable x to represent AB, we have the ratio x/17.

This gives us the proportion

42/21 = x/17

Cross multiplying, we have

42(17) = 21(x)

714 = 21x

Dividing both sides by 21,

714/21 = 21x/21

34 = x

a. 74 degrees

step-by-step explanation:

because the lines through the side and the box in the corners shows that these are congruent triangles and since they are mirrored the 37 degrees is also mirrored so the answer is 37 * 2 which is 74.

answer: huh

step-by-step explanation: