Medium
The figure shows two rectangles, one upright with sides 3 cm and 4 cm, and the same rectangle shown slanted (rotated) within the figure. What is the area of the slanted rectangle in square centimeters?
Explanation
Explanation
Rotating a rectangle does not change its area. The slanted rectangle shown has the same dimensions (3 cm x 4 cm) as the upright one, so its area remains 3 x 4 = 12 square centimetres.
PRO TIP
Re-check your working by substituting the answer back into the original question.