# Lines, Angles and Quadrilaterals (IMO- Mathematics Olympiad (SOF) Class 9): Questions 17 - 21 of 126

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## Question number: 17

MCQ▾

### Question

In the figure below, lines PQ and JK intersect at O. if and, then are equal to ________

### Choices

Choice (4) Response

a.

90˚

b.

54˚

c.

58˚

d.

56˚

## Question number: 18

MCQ▾

### Question

In the given figure, and . Then ∠URS is________

### Choices

Choice (4) Response

a.

140˚

b.

160˚

c.

190˚

d.

120˚

## Question number: 19

MCQ▾

### Question

If l, m, n are three parallel lines and the transversals t1 and t2 cut the lines l, m, n at the points A, B, C and P, Q, R as shown in the figure, then________.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 20

MCQ▾

### Question

The angles of quadrilateral are in the ratio . All angles of a quadrilaterals are________

### Choices

Choice (4) Response

a.

72˚, 36˚, 108˚, 144˚

b.

36˚, 60˚, 20˚, 156˚

c.

145˚, 20˚, 30˚, 60˚

d.

108˚, 144˚, 45˚, 15˚

## Question number: 21

MCQ▾

### Question

In figure PQ, RS and TU are three lines concurrent at A. If ∠PAU = 6y˚, ∠QAS = 4y˚ and ∠RAT = 2y˚, the value of y is________

### Choices

Choice (4) Response

a.

15

b.

25

c.

30

d.

20