Question

if these two figures are similar, what is the measure of the missing angle? 90° 102° 90° 78° ?

Explanation:

Step1: Recall similar figures property

Similar figures have congruent corresponding angles.

Step2: Match corresponding angles

The missing angle corresponds to the $90^\circ$ angle in the first trapezoid (the bottom-left angle, matching the position of the unknown angle in the second trapezoid).

Answer:

$90$