The sum of the radii of two circles is 12 cm. The diameter of one circle is 10 cm. What is the area of the other circle?

The sum of the radii of two circles is 12 cm. The diameter of one circle is 10 cm. What is the area of the other circle?

12-10 △ 2 = 7 (CM), 3.14 × 72, = 3.14 × 49, = 153.86 (cm 2); answer: the area of the other circle is 153.86 cm 2