3 Math Questions 10pts+Like!

Question

What should be the perimeter of a regular hexagon with 60-mm sides?

Which digit in the decimal 4.705 is the thousandth?

A cube has 3-cm by 3-cm faces. What is the cubes surface area?

Answer 1

• Perimeter of the regular hexagon with side a : (P ) = 6a.

Each side of the regular hexagon measuring : a = 60 mm.

∴ Perimeter of the regular hexagon : P = 6 * 60 = 360 mm.

• The decimal number is 4.705.

To the right of the decimal → tenths, hundredths, thousandths, ten - thousandths, ...........

∴ 5 in the decimal 4.705 is the thousandth.

• Surface area of a cube with edge a : (A) = 6a² .

Edge of the cube measuring : a = 3 cm.

∴ Surface area of the cube : A = 6 * 3² = 6 * 9 = 54 cm² .