of the students in the lunch room 40% are girls there are 20 girls in the the lunch room how many students are in the lunch room
2 answers:
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a. i. Calculate the area of the complete semicircunference, and substract the area of both internal semicircunference.
Let A the area that we need to calculate, let B the area of the total semicircunference, and C the sum of the internal semicircunferences.
a. ii. The same idea. Let P the perimeter that we need to calculate, and let P' the perimeter of the total semicircunference, and Q the sum of the perimeters of the internal semicircunferences.
b. i
b. ii