# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 178 - 184 of 931

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## Question 178

### Question

MCQ▾If two complementary angles are in the ratio 13: 5, then the angles are________

### Choices

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

a. | 65˚, 25˚ | |

b. | 13 x˚, 5 x˚ | |

c. | 15˚, 85˚ | |

d. | 65˚, 35˚ |

## Question 179

### Question

MCQ▾If a right triangle has sides of length 1 and , which of the following could be the length of the remaining side?

- 1

### Choices

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

a. | 3 Only | |

b. | 1 Only | |

c. | 1 And 3 Only | |

d. | 2 Only |

## Question 180

### Question

MCQ▾If and x and y are positive integers, then y could be which of the following?

### Choices

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

a. | 4 | |

b. | 5 | |

c. | 3 | |

d. | 2 |

## Question 181

### Question

MCQ▾In the figure , form a linear pair and . Then a, b respectively are________

### Choices

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

a. | 110˚, 70˚ | |

b. | 120˚, 80˚ | |

c. | 80˚, 120˚ | |

d. | 70˚, 100˚ |

## Question 182

### Question

MCQ▾All the three quadrilaterals ADEC, ABIH and BCGF are squares and if the area of and area of , then find the area of BCGF?

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 183

### Question

MCQ▾If two supplementary angles are in the ratio 13: 5, then the angles is ________

### Choices

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

a. | 120˚, 60˚ | |

b. | 125˚, 55˚ | |

c. | 130˚, 50˚ | |

d. | 145˚, 35˚ |

## Question 184

### Question

MCQ▾Two supplementary angles differ by 34˚. Then the angles are ________

### Choices

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

a. | 107˚, 73˚ | |

b. | 74˚, 107˚ | |

c. | 120˚, 60˚ | |

d. | 72˚, 108˚ |