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reneewilliams20
08.03.2021 •
Mathematics
What 9 + 10?
I rlly need answer pls
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Ответ:
Ответ:
It can be 910 but I will said 19
Ответ:
Step-by-step explanation:
the angle ABC = 180 - x, as ABD and ABC are complementary angles on top of the bottom line : all angles around a point on one side of a line are always adding up to 180 degrees.
but because we also know that the sum of all angles in a triangle is 180 degrees too, we can say
180 = ACB + ABC + CAB
180 = y + 180 - x + CAB
0 = y - x + CAB
x = y + CAB
x - y = CAB
therefore, the second answer option is correct.