Which of the following is/are point symmetric? (a)   Rectangle                            (b) Square (c)   Parallelogram                      (d) All of these

Which of the following is point symmetric? (a) Equilateral triangle (b) Trapezium (c) Rectangle (d) None of these

Which of the following organisms is radially symmetrical? (A) Pila (B) Echinus (C) Cucumaria (D) Both (B) and (C )

Let A be a square matrix. Then which of the following is not a symmetric matrix -

Which of the following is a symmetric matrix? (A) a null matrix (B) a triangular matrix (C) an idenity matrix (D) a diagonal matrix

Give reasons for the following :(a) A square can be thought of as a special rectangle.(b) A rectangle can be thought of as a special parallelogram.(c) A square can be thought of as a special rhombus.(d) Squares, rectangles, parallelograms are all quadrilaterals.(e) Square is also a parallelogram.

A quadrilateral whose each angle is a right angle is a (a) square (b) rectangle (c) rhombus (d) parallelogram

The points (5,-4,2), (4,-3,1), (7,6,4) and (8,-7,5) are the vertices of a. a rectangle b. a square c. a parallelogram d. none of these

Fill in the blanks in each of the following, so as to make the statement true: A rectangle is a parallelogram in which.... A square is a rhombus in which.... A square is a rectangle is which....

A tetrahedron is a pyramid whose base is a (a) triangle (b) square (c) rectangle (d) quadrilateral

If two diameters of a circle intersect each other at right angles, then quadrilateral formed by joining their end points is a (a) rhombus (b) rectangle (c) parallelogram (d) square