Types of quadrilateral

Q.

Which among the given statements is correct?

1. The diagonals of a parallelogram are perpendicular.
2. Every quadrilateral is either a trapezium or a parallelogram or a kite.
3. If the diagonals of a quadrilateral intersect at right angles, it is not necessarily a rhombus.
4. The diagonals of a rectangle are perpendicular to each other.

Q. Match the following with the values of 'x'.

1. 90°
2. 100°
3. 75°

Q. Which of the following statements are incorrect?

1. Three non-collinear points form a triangle.
2. No three vertices of a quadrilateral are collinear.
3. Any two vertices of a quadrilateral are non - collinear.
4. Four non - collinear points form a quadrilateral.

Q. Identify the collinear points in the figure:

1. Vertices B and C
2. Vertices A and B
3. Vertices A and D
4. All of these