Total area of board = 20cm*30cm = 600 cm2
Since 4 divides 20, there is no problem of left over strips.
Area of each card = 4cm*3cm = 12 cm2
Number of cards = 600/12 = 50
Rectangular
Rectangular Prism
On a pin board with a rectangular grid you can have an equilateral quadrilateral, and a scalene triangle.
you will need the board's thickness to answer this question.
The area of a board is normally defined by two measures: its length and breadth. Three measures suggests it may be triangular in shape, but it is not easy to be sure.
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A plank is a "board" which has the homophone "bored." (a sound-alike word)
To find the centre of a square or rectangular board, draw a diagonal line from corner to corner. Repeat for the remaining two corners. Both lines will cross over at the centre of the board.
A skateboard that measures 7and half feet across.
3 1/24
A 1x2 wood board actually measures 3/4 inch thick by 1 1/2 inches wide.
The wood board stand measures 24 inches in length, 12 inches in width, and can hold up to 50 pounds.