17 .
Find the value of k, if the distance between the points (1, 4), (k, 1) is 5.

A. | 3 or 5 | B. | 3 or –5 |

C. | –3 or 5 | D. | None of these |

18 .
The points whose coordinates are (2, 2), (6, 3),(4, 11) forms

A. | a right angle | B. | an equilateral |

C. | scalene triangle | D. | a isosceles triangle |

19 .
The following points A (–1, 0), B (3, 1), C (2, 2) and D (–2, 1) taken in order form a

A. | square | B. | rectangle |

C. | parallelogram | D. | None of these |

20 .
The following points (3a, 0), (0, 3b), (a, 2b) forms a

A. | triangle | B. | straight line |

C. | equilateral triangle | D. | None of these |

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