Supplementary angles add up to 180 degrees, so look for two angles by each other that add up to 180 degrees.
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1:40 because if we think of this just like a fraction

that simplifys down to

and because fraction simplifications are similar (related to each other) we can concur that these would be too.
Enjoy!=)
A/Wall if you have 20 and 30 that box is missing # so you will need to times and you will get something like this 20×30=60 and that's the missing #
B/Its going to be about 768 so you need to times and if you don't get 768
Answer:
-7, -
-
, 9
Step-by-step explanation: