# Mathematics [NSTSE (National Science Talent Search Exam- Unified Council) Class 9]: Questions 276 - 280 of 989

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## Question number: 276

» Mathematics » Circles

### Question

A chord of a circle is 80 cm in length and its distance from the center is 9 cm. Find the length of the chord of the same circle which is at a distance of 40 cm from the center.

### Choices

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

a. | 18 cm | |

b. | 36 cm | |

c. | 9 cm | |

d. | 20 cm |

## Question number: 277

» Mathematics » Lines and Angles

### Question

Can 5 cm, 7 cm, 3 cm form a triangle?

### Choices

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

a. | Yes | |

b. | No | |

c. | Sometimes | |

d. | All of the above |

## Question number: 278

» Mathematics » Lines and Angles

### Question

At 6 O’clock the angle formed between the hands of a clock is

### Choices

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

a. | Obtuse angle | |

b. | Right angle | |

c. | Acute angle | |

d. | Straight angle |

## Question number: 279

» Mathematics » Lines and Angles

### Question

If two lines l and m are perpendicular to each other then they are symbolically written as

### Choices

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

a. |
| |

b. |
| |

c. |
| |

d. | Question does not provide sufficient data or is vague |

## Question number: 280

» Mathematics » Lines and Angles

### Question

In the above figure and are called

### Choices

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

a. | Corresponding | |

b. | Alternate | |

c. | Vertically opposite | |

d. | All of the above |