Wondering why we are given both values. If the triangle is inscribed, I think we can calculate the radius given triangle area and vice versa.
Maybe it's just the beer talking, but given the equilateral triangle area of 63, the distance from the center of the circle in the middle (the one the triangle is inscribed in) to any corner of the triangle is definitely not 7.
It's close. Area 63 implies radius 6.964; radius 7 implies area 63.65.
How much does a grade 6 student know of geometry and trigonometry there? Apparently they aren't expected to know enough to do what I did above! So this must require only ... what?
Wondering much about that too.
It would be interesting indeed to see how that teacher, a fellow drinker, would justify those figures. I speak drunk fluently and I have trouble figuring out how them figures ended up as the model answer.
First, it troubles me that they are taking pi to be exactly 22/7; it should at least be stated that you are to use that approximation (though perhaps that is understood within this course).