Can someone please help me with this Pythagorean theorem question?

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

Which questions would most a reader identify the author's purpose for writing? check all that apply. what type of text is this? what type of reviews did the book receive? how many copies of the book have been sold? what is the central idea? how does this text make one feel?