(1) Calculate the square root of €20.

(2) Find the value of €7².

(3) If the circumference of a circle is €15, what is the radius of the circle?

(4) Evaluate the expression: € 4.50 - €2€.

(5) What is the value of €5?

(6) If the hypotenuse of a right triangle is €10 and one of the legs is €7€, what is the length of the other leg?

(7) Calculate the area of a square with side length €4.

(8) If the diameter of a circle is €12, what is the area of the circle?

(9) Find the value of €§§V11(2,6,1)§€⁴.

(10) If the side length of a cube is €5, what is its volume?