As shown in the figure, the area of the triangle is 15 square centimeters. The area of the whole circle is 15 square centimeters______ Square centimeter

As shown in the figure, the area of the triangle is 15 square centimeters. The area of the whole circle is 15 square centimeters______ Square centimeter

Let the radius of a circle be r, then 12 × R × r = 15, R2 = 30, so π R2 = 3.14 × 30 = 94.2 (square centimeter). Answer: the area of a circle is 94.2 square centimeter