# Triangles and Circles (IMO Level 1- Mathematics Olympiad (SOF) Class 9): Questions 5 - 8 of 79

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## Question number: 5

» Triangles and Circles

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MCQ▾

### Question

In the given figure, three equilateral triangles have a common vertex then

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 6

» Triangles and Circles

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MCQ▾

### Question

If one leg of an isosceles right-angles triangle is increased by 6 cm and the other leg is increased by 4 cm, then change in area of the triangle is 24 sq. cm. find the length of the leg of the original triangle.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 7

» Triangles and Circles

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MCQ▾

### Question

Triangle PAB is formed by three tangents to circle with center O and, then angle ACB equals ________

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Choice (4) Response

a.

b.

c.

d.

## Question number: 8

» Triangles and Circles

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MCQ▾

### Question

An exterior angle of a triangle is and the measure of the two remote interior angles are 25 degree and degree. x = ________.

### Choices

Choice (4) Response

a.

24

b.

29

c.

20

d.

25

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