# IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 215 - 218 of 929

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## Question number: 215

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MCQ▾

### Question

In the given figure, BO, CO is angle bisectors of external angles of △ABC. Then BOC is ________ Image Defines the Angle Image defines the angles and find the angle values

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 216

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MCQ▾

### Question

In the figure below, lines XY and MN intersect at O. if and, then are equal to ________ Image Defines Lines XY and MN Intersect at O Image defines the two lines intersect and find the value of ∠XON

### Choices

Choice (4) Response

a.

130˚

b.

90˚

c.

126˚

d.

180˚

## Question number: 217

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MCQ▾

### Question

Triangle PAB is formed by three tangents to circle with center O and, then angle ACB equals ________ Triangle PAB is Formed by 3 Tangents to Circle with Center O Given the Triangle PAB is formed by three tangents to circle with center O and angle APB is 80 then find the angle AOC equals value

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 218

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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 = ________. The Exterior Angle of a Triangle and 2 Interior Angles Measure Given the exterior angle of a triangle and the measure of the two remote interior angles, find the value of x

### Choices

Choice (4) Response

a.

24

b.

29

c.

20

d.

25