(1) Calculate the square root of €20.

(2) Find the value of €3².

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

(4) Evaluate the expression: € 6 - €4€.

(5) What is the value of €4?

(6) If the hypotenuse of a right triangle is €6 and one of the legs is €5€, what is the length of the other leg?

(7) Calculate the area of a square with side length €10.

(8) If the diameter of a circle is €18, 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 €1, what is its volume?