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Shkiper50 [21]
3 years ago
10

Helppppppppppp please

Mathematics
1 answer:
LenaWriter [7]3 years ago
3 0

Answer:

x = 60°

Step-by-step explanation:

AOB    Center: O      AB: diameter

arc ADB = 180°

arc DB = 180 - arc AD = 80°

x = 1/2 x ( arc DB + arc AC) = 1/2 x (80 + 40) = 60°

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