# IMO Level 1- Mathematics Olympiad (SOF) Class 7: Questions 576 - 581 of 1022

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## Question 576

### Question

MCQ▾A triangle whose lengths of sides are 5 cm, 12 cm and 13 cm. The triangle is ________.

### Choices

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

a. | Triangle is not formed | |

b. | Acute-angled triangle | |

c. | Obtuse-angled triangle | |

d. | Right-angled triangle |

## Question 577

### Question

MCQ▾One of the exterior angle of a triangle is , interior opposite angles are in ratio 3: 2. The angles of triangle are

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 578

### Question

MCQ▾In the adjoining figure, ABCD is a square, BCF is an equilateral triangle and AEDF is a rhombus. Find .

### Choices

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

a. | ||

b. | ||

c. | ||

d. | None of the above |

## Question 579

### Question

MCQ▾In the given figure, triangles ABC and DCB are right angled at B and C respectively and , then of from

### Choices

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

a. | ASS | |

b. | SAS | |

c. | AAA | |

d. | All of the above |

## Question 580

### Question

MCQ▾Two chimneys 18 m and 13 m high stand upright on a ground. If their feet are 12 m apart, then the distance between their tops is ________.

### Choices

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

a. | 5 m | |

b. | 31 m | |

c. | 13 m | |

d. | 18 m |

## Question 581

### Question

MCQ▾Which of the following statements is false?

### Choices

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

a. | If two sides and one angle of a triangle are equal to the corresponding two sides and the angle of another triangle, then the two triangles are congruent. | |

b. | Two triangles having same area are congruent. | |

c. | In the hypotenuse of one right triangle is equal to the hypotenuse of another triangle, then the triangles are congruent. | |

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