The length of the diagonal of a square is `d` units. The area of the square is (a)`d^2` (b) `1/2d^2` (c)`1/4d^2` (d) `2d^2`

The length of the diagonal of a square is 20cm. Its area is (a)400 c m^2 (b) 200 c m^2 (c)300 c m^2 (d) 100sqrt(2)\ c m^2

In Fig. , the area of A B C (in square units) is (a) 15 (b) 10 (c) 7.5 (d) 2.5

If the ratio of the areas of two square is 9:1, then the ratio of their perimeters is (a) 2:1 (b) 3:1 (c) 3:2 (d) 4:1

The ends of a diagonal of a square are (2,-3) and (-1,1)dot Another vertex of the square can be (a) (-3/2,-5/2) (b) (5/2,1/2) (c) (1/2,5/2) (d) none of these

The ratio of the areas of two squares, one having its diagonal double that of the other , is (a) 2:1 (b) 3:1 (C) 3:2 (d) 4:1

The area of a square and that of a square drawn on its diagonal are in the ratio (a) 1:sqrt(2) (b) 1:2 (c) 1:3 (d) 1:4\

The ratio of the areas of two squares, one having its diagonal double than the other, is (a) 1:2 (b) 2:3 (c) 3:1 (d) 4:1

The ratio of the area and circumference of a circle of diameter d is (a) d (b) d/2 (c) d/4 (d) 2\ d

The ratio of the area of a square of side a and that of an equilateral triangle of side a , is (a) 2:1\ (b) 2:sqrt(3)\ (c) 4:3 (d) 4:sqrt(3)

A line meets the coordinate axes at A and B . A circle is circumscribed about the triangle O A Bdot If d_1a n dd_2 are distances of the tangents to the circle at the origin O from the points Aa n dB , respectively, then the diameter of the circle is (a) (2d_1+d_2)/2 (b) (d_1+2d_2)/2 (c) d_1+d_2 (d) (d_1d_2)/(d_1+d_2)