# IMO Level 1- Mathematics Olympiad (SOF) Class 7: Questions 579 - 583 of 1022

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## 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 |

## Question 582

### Question

MCQ▾In the figure (not drawn to scale), ADF and BEF are triangles and EC = ED, find x.

### Choices

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

a. | ||

b. | ||

c. | ||

d. |

## Question 583

### Question

MCQ▾In the figure (not drawn to scale), ABCD is a quadrilateral, BED and AEC are straight lines and EB = EC. Find y.

### Choices

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

a. | ||

b. | ||

c. | ||

d. |