Angle 2=3, so angle 1=4 because angles ABC & BCD equal 90°. When you add together the angles of a triangle you get 180 and if you could put angle 1 and 4 together it would look like an upward version.
That is the best way I could describe it. Hope that helps.
Answer:
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Step-by-step explanation:
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Hey. Why are you so worried. Here is the answer. There is a very small problem.It is that the decimal point is not added.
Answer:
-3/15 is the difference between 6/15-9/15