# Lines, Angles and Quadrilaterals (IMO- Mathematics Olympiad (SOF) Class 9): Questions 39 - 45 of 126

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## Question number: 39

MCQ▾

### Question

If , and, then x and y respectively are ________

### Choices

Choice (4) Response

a.

40˚, 30˚

b.

90˚, 30˚

c.

30˚, 45˚

d.

50˚, 77˚

## Question number: 40

MCQ▾

### Question

If the diagonals of a parallelogram are equal, then it is a ________

### Choices

Choice (4) Response

a.

Trapezium

b.

Rectangle

c.

Rhombus

d.

Square

## Question number: 41

MCQ▾

### Question

In the given figure and, then value of x is________.

### Choices

Choice (4) Response

a.

90˚

b.

80˚

c.

85˚

d.

95˚

## Question number: 42

MCQ▾

### Question

In the figure, find ________

### Choices

Choice (4) Response

a.

115˚

b.

120˚

c.

105˚

d.

100˚

## Question number: 43

MCQ▾

### Question

How many sides does a regular polygon have, each angle of which is of measure 150˚?

### Choices

Choice (4) Response

a.

16

b.

18

c.

12

d.

17

## Question number: 44

MCQ▾

### Question

If two complementary angles are in the ratio 4: 11, then the angles are________

### Choices

Choice (4) Response

a.

56˚, 34˚

b.

61˚, 29˚

c.

24˚, 66˚

d.

30˚, 60˚

## Question number: 45

MCQ▾

### Question

In a parallelogram, the sum of the angle bisectors of two adjacent angles is ________

### Choices

Choice (4) Response

a.

45˚

b.

60˚

c.

90˚

d.

30˚

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