Find the square root of the following numbers in decimal form:

0.813604

Find the greatest number of 5 digits which is a perfect square.

Find the smallest number which must be added to 2300 so that it becomes a perfect square.

Find the length of the side of a square whose area is 441 m²

In a right triangle ABC, ∠B = 90°

(a) If AB = 6 cm, BC = 8 cm, find AC

(b) If AC = 13 cm, BC = 5 cm, find AB