Вписанные и описанные углы в окружности
Quiz
•
Mathematics
•
9th Grade
•
Hard
Семенова Варвара
Used 5+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Центральный угол AOB опирается на хорду AB длиной 6. При этом угол OAB равен 60°. Найдите радиус окружности.
6
3
9
2.
FILL IN THE BLANK QUESTION
1 min • 1 pt
В окружности с центром в точке О проведены диаметры AD и BC, угол OCD равен 30°. Найдите величину угла OAB.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Найдите градусную меру центрального ∠MON, если известно, NP — диаметр, а градусная мера ∠MNP равна 18°.
72
144
288
38
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Найдите ∠DEF, если градусные меры дуг DE и EF равны 150° и 68° соответственно.
90
45
71
142
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Треугольник ABC вписан в окружность с центром в точке O. Найдите градусную меру угла C треугольника ABC, если угол AOB равен 48°.
12
48
90
24
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Точка О — центр окружности, ∠AOB = 84° (см. рис.). Найдите величину угла ACB (в градусах).
21
42
85
84
7.
FILL IN THE BLANK QUESTION
1 min • 1 pt
На окружности с центром O отмечены точки A и B так, что Длина меньшей дуги AB равна 63. Найдите длину большей дуги.
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