IMO Level 1- Mathematics Olympiad (SOF) Class 9: Questions 158 - 163 of 931

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Question 158

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Question

MCQ▾

The angles of a triangle are in the ratio . The triangle is ________

Choices

Choice (4)Response
a.Right
b.Scalene
c.Acute
d.Isosceles

Question 159

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Question

MCQ▾

The measure of an angle is three times the measure of its supplementary angle. Then the angles are________

Choices

Choice (4)Response
a.45˚, 135˚
b.28˚, 72˚
c.26˚, 154˚
d.50˚, 100˚

Question 160

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Question

MCQ▾

In the given figure . Which of the following must be true?

Here in image define the l1 and l2 are parallel lines

Here in Image Define the l1 and l2 Are Parallel Lines

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Choices

Choice (4)Response
a.
b.
c.
d.

Question 161

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Question

MCQ▾

If the bisectors of two adjacent angles A and B of a quadrilateral ABCD intersects at a point O such that , then value of k is ________

Image defines the bisectors of two adjacent angles A and B

Image Defines the Bisectors of Two Adjacent Angles a and B

Loading image

Choices

Choice (4)Response
a.5
b.4
c.3
d.2

Question 162

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Question

MCQ▾

XYZ is an equilateral triangle for side. J, K and L are midpoints of XY, YZ and XZ respectively. The area of triangle JKL is (in) ________

XYZ is an equilateral triangle for side given

XYZ is an Equilateral Triangle for Side Given

Loading image

Choices

Choice (4)Response
a.
b.
c.
d.

Question 163

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Question

MCQ▾

The supplementary angle of an angle is one fifth of itself. Then the angle of its supplement are________

Choices

Choice (4)Response
a.160˚, 130˚
b.150˚, 30˚
c.160˚, 20˚
d.150˚, 45˚