# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 214 - 219 of 931

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## Question 214

### Question

MCQ▾Diagonals of a rectangle ABCD intersect at O. if , then ∠DCO is ________

### Choices

Choice (4) | Response | |
---|---|---|

a. | 70˚ | |

b. | 55˚ | |

c. | 35˚ | |

d. | 110˚ |

## Question 215

### Question

MCQ▾In the given figure, BO, CO is angle bisectors of external angles of △ABC. Then BOC is ________

### Choices

Choice (4) | Response | |
---|---|---|

a. | ||

b. | ||

c. | ||

d. |

## Question 216

### Question

MCQ▾In the figure below, lines XY and MN intersect at O. if and, then are equal to ________

### Choices

Choice (4) | Response | |
---|---|---|

a. | 130˚ | |

b. | 90˚ | |

c. | 126˚ | |

d. | 180˚ |

## Question 217

### Question

MCQ▾Triangle PAB is formed by three tangents to circle with center O and, then angle ACB equals ________

### Choices

Choice (4) | Response | |
---|---|---|

a. | ||

b. | ||

c. | ||

d. |

## Question 218

### Question

MCQ▾An exterior angle of a triangle is and the measure of the two remote interior angles are 25 degree and degree. x = ________.

### Choices

Choice (4) | Response | |
---|---|---|

a. | 24 | |

b. | 29 | |

c. | 20 | |

d. | 25 |

## Question 219

### Question

MCQ▾The number of spherical bullets each 0.6 cm in diameter be made out of a rectangular solid is ________

### Choices

Choice (4) | Response | |
---|---|---|

a. | 10250 | |

b. | 10200 | |

c. | 10500 | |

d. | 10550 |