What is 2 times 1 7/8 equal to?

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

Is triangle jkl congruent to triangle rst? if so, what is the scale factor?

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *