Answer:
11. 84cm² or sentimetro²
Explanation for Number 11:
To find the area of he polygon you need to multiply 12 by 7 which is 84cm²
Formula for finding Area of a rectangle:
Number 11 is polygon named quadrilateral and its type is a Rectangle.
A rectangle is a 2D shape in geometry, having 4 sides and 4 corners. Its two sides meet at right angles. Thus, a rectangle has 4 angles, each measuring 90 ̊. The opposite sides of a rectangle have the same lengths and are parallel.
The Formula for finding the area of a rectangle is A = L x W = N
Here's an example this rectangle has a length of 10cm and a width of 5cm
Its area is 50cm²
