unit 203 SI units

What is the basic unit of length in the SI system?

• Kilometre

• Centimetre

• Metre

• Millimetre

What is the symbol for metre?

• km

• cm

• m

• mm

How is the current international definition of a metre defined?

• The distance travelled by light in a vacuum in 1/299,792,458 seconds

• The distance travelled by sound in air at sea level in 1 second

• The length of the equator divided by 40,000,000

• The height of Mount Everest

How many metres are there in a kilometre?

• 10 metres

• 100 metres

• 1,000 metres

• 10,000 metres

What is the scientific notation for a centimetre?

• 1 x 10^2

• 1 x 10^-2

• 1 x 10^3

• 1 x 10^-3

What fraction of a metre is a millimetre?

• 1/10th of a metre

• 1/100th of a metre

• 1/1,000th of a metre

• 1/10,000th of a metre

What is the mathematical definition of area?

• The amount of space taken up by a three-dimensional object.

• The length of a two-dimensional object.

• The amount of space taken up by a two-dimensional object.

• The perimeter of a two-dimensional object.

How is the area of a rectangle calculated?

• Area = length + width

• Area = length x width

• Area = 0.5 x length x width

• Area = length / width

How is the area of a triangle calculated?

• Area = base x height

• Area = length x width

• Area = 0.5 x base x height

• Area = base + height

¿Cuál es la fórmula para calcular el área de un círculo?

• Área = 2πr

• Área = πr^2

• Área = πr

• Área = 2πr^2