You label it square if it is a square
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Square units of the corresponding linear measurements.
The label is placed on the curved surface area of the cylinder. Its area can be found using the formula A = 3.14dh where d is the diameter and h is the height of the can. It is rectangular in shape.
The area of rectangle is : 21.0
Diameter = 6.6cm, so radius = 3.3cm Circumference = 2 * pi * radius Circle. = 20.735 cm Now we multiply by the length..... 20.735 * 8.8 = 182.468 cm^2 Now we have the 1cm overlap, which technically is a rectangle of dimensions 1cm * 8.8cm i.e. 1 * 8.8cm = 8.8 cm^2 We just add this on..... 182.468 + 8.8 = 191.268 cm^2 or 191.27 cm^2 (to 2dp)
The area enclosed by a chord is equal to the area enclosed by a segment minus the area enclosed by the triangle with the same corners as the segment. To visualise it, draw a circle and put a chord on it. Label the chord AB and the centre of the circle C. The area of sector AB equal to the area of sector ABC minus the area of triangle ABC.