Find the Area of rectangle and diagonal of rectangle

Find the length of the diagonal of a rectangle whose sides are 12cm and 5cm.

Find the length of the diagonal of a rectangle whose sides are 21 cm and 20 cm.

The equation of one side of a rectangle is 3x-4y-10=0 and the coordinates of two of its vertices are (-2, 1) and (2, 4) . Find the area of the rectangle and the equation of that diagonal of the rectangle which passes through the point (2, 4) .

find the length of the diagonal of a rectangle whose sides are 8 m and 6m.

Find the area of a rectangle of dimensions 4.7 cm and 5.8 cm.

The sides of a rectangle are given by the equations x=-2, x = 4, y=-2 andy=5. Find the equation of the circle drawn on the diagonal of this rectangle as its diameter.

Each side of a rectangle is doubled. Find the ratio between : (i) perimeters of the original rectangle and the resulting rectangle (ii) areas of the original rectangle and the resulting rectangle

The average length of all the sides of a rectangle equals twice the width of the rectangle. If the area of the rectangle is 18, what is its perimeter?

Find the area of a rectangle of length 4 m and breadth 120 cm.