I've struggled with this problem for a while now, andI just can’t see how to solve it. I think you should use an equation to solve it.​

This is just my thinking

Step-by-step explanation:

The conditions you mentioned are obviously not enough to use the data to calculate the solution. The attached picture can clearly explain the reason. The vertical line segment on the diameter of the large circle can have countless changes due to the size changing of the circle. Try to find out if something is missing.

The left fig: shaded area is 0.98, while the right side fig is 1.04

May be i do not get the right logic, because the two small semicircle also expand or shrink with the change of large one.

  q

step-by-step explanation:

each line from a vertex to the midpoint of the opposite side is called a median. the point where the medians intersect, point q, is the centroid.

the centroid of δabc is point q.

3< x< 5

step-by-step explanation:

|x - 4| < 1

there are two solutions, one positive and one negative.   remember to flip the inequality when taking the negative solution

x-4 < 1       x-4 > -1

add 4 to each side

x-4+4 < 1+4       x-4+4 > -1+4

x< 5                 x> 3

3< x< 5