Asap 25 pts + brainliest to right/best answer

1. what are the missing reasons in the proof 2. it's in the second picture and 3

Thanh and her crew are building a stage in the shape of a trapezoid for an upcoming festival. the lengths of the parallel sides of the trapezoid are 14 ft and 24 ft. the height of the trapezoid is 12 ft.what is the area of the stage? enter your answer in the box. ft²

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.