Plz help me qwq

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

Combine the information in the problem and the chart using the average balance method to solve the problem.