# Mathematics [NSTSE (National Science Talent Search Exam- Unified Council) Class 9]: Questions 67 - 69 of 989

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## Question 67

Mathematics
Edit

### Question

MCQ▾

As shown in the figure, ABC is a triangle inscribed in a circle with center O. If then is equal to

### Choices

Choice (4)Response

a.

b.

c.

d.

All of the above

## Question 68

Mathematics
Edit

### Question

MCQ▾

The basic elements of a triangle are

### Choices

Choice (4)Response

a.

3 vertices

b.

3 sides

c.

3 angles

d.

All a. , b. and c. are correct

## Question 69

Edit

### Question

MCQ▾

ABCD is a parallelogram and ‘O’ is the point of intersection of its diagonals AC and BD. If the area of , the area of the parallelogram is ________.

### Choices

Choice (4)Response

a.

b.

c.

d.