# 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 . Image Made by a Square ABCD and an Equilateral Triangle

### 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 Two Triangles DCB and ABC

### 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