You cannot draw a single rectangle which has an area of 12 cm because 12 cm is a measure of length, not area!
There are an infinite number of rectangles with an area of 12 cm2.
Let L be any length greater than or equal to sqrt(12) = 3.464 cm (approx)
and let B = 12/L cm
Then Area = L*B = 12 cm2 and each value of L gives a different rectangle.
A rectangle can have only 2 dimensions and so finding the area from the given 4 dimensions has many possibilities.
Hoe
two
There are many possible answers. You could draw a 4 cm x 7 cm rectangle and remove a 1 cm x 3 cm rectangle from it.
4
A rectangle can have only 2 dimensions and so finding the area from the given 4 dimensions has many possibilities.
Hoe
two
There are many possible answers. You could draw a 4 cm x 7 cm rectangle and remove a 1 cm x 3 cm rectangle from it.
4
Same as a rectangle.
There are many different triangles that have an area of three square inches, here's one way to draw one: Draw a rectangle whose area is six square inches (or imagine what one's dimensions would be, e.g. 6x1 or 3x2) and cut it in half diagonally to make a right triangle that has an area of three square inches.
The area of the rectangle is the product of the length of the sides (provided the units of length are the same). Imagine a rectangle 6ft long and 10ft wide. You could even draw it if it helps. 6 multiplied by 10 is 60, so the area of a 6ft*10ft rectangle is 60ft2 or 60 sq. ft.
Infinite amounts.
120
It isn't. The area of a rectangle is length x width. What you are doing is counting how many square units will fit in the shape.
Let B be any positive number less than sqrt(12) and let L = 12/B. Then a rectangle with sides of L cm and B cm will have an area of L*B = (12/B)*B = 12 cm2. Since there are infinitely many possible choices for B, there are infinitely many possible rectangles.