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

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## Question 579

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### 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

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### 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

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### 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

Edit

### 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

Edit

### 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.