To determine if the lengths given create a right triangle you can set up equations. According to Pythagorean Theorem, the square of the longest side would equal the sum of the squares of the smallest 2 sides.
1st given set: 15 + 25 < 64
This CANNOT be a right triangle. The sum of the 2 smallest sides is less than the sum of the longest side.
2nd given set: 64 + 100 < 256
This CANNOT be a right triangle. Again, the sum of the 2 smallest sides is less than the sum of the longest side.
3rd given set: 3,4,5
This CAN be a right triangle. These 3 numbers are multiples of 7, and if you factored 7 out of them you are left with 3,4,5 which is a triple. Triples are combinations of numbers that are guaranteed to create right triangles. 3,4,5 is one of the most basic triples. Hope this helps!
Thats the answer to the problem
122.08. You multiply 109 by .12 and get $13.08. You add that on to 122.08 to get a total of $122.08
Working:
Area of the rectangle= 12 x 4 =
48cm^2Area of the semicircles=
x 2² =
12.56cm^2
48+12.56= 60.56
Answer: 60.56cm²