# Lines, Angles and Quadrilaterals (IMO- Mathematics Olympiad Class 9): Questions 79 - 83 of 126

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## Question number: 79

MCQ▾

### Question

Three parallel lines are cut by two transversals as shown in the given figure. If , and , then the length of EF is ________

### Choices

Choice (4) Response

a.

2 cm

b.

4 cm

c.

3.5 cm

d.

3 cm

## Question number: 80

MCQ▾

### Question

In the figure, and then ∠4 is________

### Choices

Choice (4) Response

a.

172˚

b.

134˚

c.

126˚

d.

136˚

## Question number: 81

MCQ▾

### Question

The angles P, Q, R, S in the parallelogram PQRS are________

### Choices

Choice (4) Response

a.

90˚, 60˚, 90˚, 60˚

b.

90˚, 90˚, 90˚, 90˚

c.

50˚, 60˚, 30˚, 40˚

d.

50˚, 45˚, 80˚, 15˚

## Question number: 82

MCQ▾

### Question

The given figure WXYZ is a parallelogram then the values of and are________

### Choices

Choice (4) Response

a.

78˚, 35˚

b.

20˚, 40˚

c.

50˚, 60˚

d.

35˚, 70˚

## Question number: 83

MCQ▾

### Question

The measurement of a window is , if 6 doors are to be fixed in that window in two rows, measurements of each door should be________

### Choices

Choice (4) Response

a.

b.

c.

d.

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