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Agata [3.3K]
3 years ago
11

Математика срочно пожалуйста​ ​

Mathematics
1 answer:
azamat3 years ago
7 0

Step-by-step explanation:

2,3÷2,5=23÷25=0,92

0,3÷0,8=3÷8=0,375

1,7÷025=170÷25=6,8

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Quadrilateral ABCD​ is inscribed in this circle.
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Opposite angles of a cyclic quadrilateral are supplementary.

\implies \: x \degree + (3x - 12) \degree = 180 \degree \\  \\ \implies \: (4x - 12) \degree = 180 \degree \\  \\  \implies \: 4x - 12  = 180  \\  \\ \implies \: 4x   = 180  + 12 \\  \\ \implies \: 4x   = 192 \\  \\ \implies \: x   =  \frac{192}{4}  \\  \\ \implies \: x   = 48\\\\

(3x-12)° = (3*48 - 12)° = (144 - 12)° = 132°

\implies \: m\angle B   = 132\degree\\\\

5 0
3 years ago
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