# IMO Level 1- Mathematics Olympiad (SOF) Class 6: Questions 380 - 387 of 1059

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## Question 380

### Question

MCQ▾Sum of all the four interior angles of a quadrilateral is equal to ________.

### Choices

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

a. | 90 | |

b. | 180 | |

c. | 360 | |

d. | 120 |

## Question 381

## Question 382

### Question

MCQ▾If Q is the midpoint of PR and R is the midpoint of QS where P, Q, R, S are collinear, then

### Choices

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

a. | PR = ₹ | |

b. | PS = QR | |

c. | PQ = QS | |

d. | PQ = ₹ |

## Question 383

### Question

MCQ▾A pair of lines which do not intersect at any point are called________.

### Choices

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

a. | Concurrent lines | |

b. | Intersecting lines | |

c. | Perpendicular lines | |

d. | Parallel lines |

## Question 384

### Question

MCQ▾In a right angled triangle if an angle measures , then the measure of other angle is

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 385

## Question 386

### Question

MCQ▾The basic elements of a square are

### Choices

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

a. | 4 sides | |

b. | 4 vertices | |

c. | 4 angles | |

d. | All a., b. and c. are correct |

## Question 387

### Question

MCQ▾Set of points extending infinitely in all directions on the same flat surface is ________.

### Choices

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

a. | Line segment | |

b. | Point | |

c. | Line | |

d. | Plane |