Answer:
the answer is -0. 9 for the question
The intersection of two planes is a line. That's not necessarily the definition of a line, but that's probably what they're looking for.
Answer: line
Answer:
all work is shown and pictured
Answer:
Read below
Step-by-step explanation:
I don't understand the answer choices, but supplementary angles add up to 180°. It looks like the third option is correct.
