Assertion: rectangle's area | /r/HasProperty | calculated
Facets:
value: by multiplying the length
type: MANNER
value: from its side length
type: OTHER
Source sentences:
text: The area of any rectangle is calculated once its length and width are known.
text: The area of a rectangle can be calculated by multiplying the length by the width while the perimeter can be calculated by adding up all the side lengths.
text: The area of a rectangle is calculated by multiplying the length by the width - the result is square measure.
text: In fact, since area and perimeter are misunderstood by some students, it may also not be obvious to some that the area of each square can be calculated from its side length.
text: and so, a rectangle with different sides (say length of 3 metres and width of 2 metres) would have an area in square units that can be calculated as:
text: The areas of irregular polygons can be calculated using the "Surveyor's formula".