## 1. How many angles does a quadrilateral have?

### Answer:

### Explanation:

By definition, a quadrilateral is a polygon with four angles.

## 2. The sum of the angles of a quadrilateral is:

### Answer:

### Explanation:

The sum of all interior angles of a quadrilateral is always 360°.

## 3. A quadrilateral with opposite sides parallel is called:

### Answer:

### Explanation:

A parallelogram has both pairs of opposite sides parallel.

## 4. Which of the following is not a property of a rectangle?

### Answer:

### Explanation:

Only a square has all sides equal, not a rectangle.

## 5. A square is a type of:

### Answer:

### Explanation:

A square is a special type of rhombus where all angles are 90°.

## 6. Which quadrilateral has only one pair of opposite sides parallel?

### Answer:

### Explanation:

A trapezium is defined by having only one pair of opposite sides parallel.

## 7. In a parallelogram, if one angle is 60°, the opposite angle is:

### Answer:

### Explanation:

In a parallelogram, opposite angles are equal.

## 8. A rhombus with all angles equal to 90° is called:

### Answer:

### Explanation:

A square is a special type of rhombus with all angles measuring 90°.

## 9. The diagonals of a rectangle are:

### Answer:

### Explanation:

The diagonals of a rectangle are equal in length and bisect each other.

## 10. Which of the following quadrilaterals has diagonals that are perpendicular bisectors of each other?

### Answer:

### Explanation:

In a rhombus, the diagonals are perpendicular bisectors of each other.

## 11. Which quadrilateral has one pair of adjacent sides equal?

### Answer:

### Explanation:

A kite is defined by having two pairs of adjacent sides equal.

## 12. In a square, the diagonals:

### Answer:

### Explanation:

In a square, the diagonals have all three mentioned properties.

## 13. A parallelogram with all sides equal is:

### Answer:

### Explanation:

A rhombus is a parallelogram with all sides equal.

## 14. The sum of adjacent angles in a parallelogram is:

### Answer:

### Explanation:

Adjacent angles of a parallelogram are supplementary.

## 15. A quadrilateral with two pairs of equal adjacent sides is:

### Answer:

### Explanation:

A kite has two pairs of equal adjacent sides.

## 16. Which of the following cannot be a property of a trapezium?

### Answer:

### Explanation:

A trapezium doesn't necessarily have opposite angles equal.

## 17. The diagonals of a kite:

### Answer:

### Explanation:

The diagonals of a kite are always perpendicular to each other.

## 18. In which quadrilateral are the opposite angles supplementary?

### Answer:

### Explanation:

In a parallelogram (not listed in options), opposite angles are supplementary.

## 19. Which of the following is not a quadrilateral?

### Answer:

### Explanation:

A triangle has three sides, while a quadrilateral has four.

## 20. Which quadrilateral has both pairs of opposite sides equal and diagonals that bisect each other?

### Answer:

### Explanation:

A parallelogram satisfies both given conditions.