Task1:
The area of a semicircle can be calculated approximately through a sum of rectangle areas under the curve of the semicircle. This sum of areas is called Lowersum.
Check the checkbox “Lowersum = “!
You see an approximated value for the area of the semicircle for 10 rectangles!
Compare the given value with the area of the semicircle!

Task2:
The same is possible for an Uppersum. Then the area of a semicircle is calculated approximately through a sum of rectangle areas above the curve of the semicircle.
Check the checkbox “Uppersum = “!
You see an approximated value for the area of the semicircle for 10 rectangles!
Compare the given value with the Lowersum and the area of the semicircle!