ROSECODE 452
Equilateral triangles 4
Assume a point inside an equilateral triangle of side length . Then we can use the three segments , and to build a new triangle .
When point is in the center of triangle , the area of triangle is , which is the maximum value for all possible positions of ; and the circumference of is , which is the minimum value. Moreover, when point is close to the vertex of triangle , the area of triangle is close to zero; and the circumference of is close to its maximum value .
Assuming that point is chosen randomly (with uniform distribution) within triangle , find the expected area and circumference of triangle . Give your answers rounded to 8 digits after the decimal point.
Answer format: [expectation of area],[expectation of circumference]
(Sample input: 0.43301270,3.46410162)
When point
Assuming that point
Answer format: [expectation of area],[expectation of circumference]
(Sample input: 0.43301270,3.46410162)