Problem As shown, there is a triangle among three equal circles that are tangent to each other. The vertex of the triangle is in the center of the upper circle, the left edge of the triangle base is in the center of the lower left circle, and the right edge is on the circumference of…

Matobeyama Shrine is located 4 km north of Kamogata Station on the JR Sanyo Main Line. Problem As shown in the figure, when a square with a side of 17 inches has a circle with a diameter of 8 inches in the center, which is surrounded by 8 equal circles, what is the diameter of…