The sum of the radii of the two circles is 12cm. The diameter of the small circle is 10cm. What is the area of the big circle?
10/2=5cm
12-5=7cm
Area of circle = π R & # 178;
3.14*7²=153.86cm²
A: the area of the big circle is 153.86cm-178;
Benefactor, I see your bones are strange,
He is a man of noble bearing and wisdom,
He is a unique talent in the Wulin
If you devote yourself to study, you will become a great tool in the future,
I have a little test, please click next to the answer
"Choose as satisfactory answer"
From the team - Potato
If you have any questions, please help me or my team
The area of a triangle is 15 square centimeters. What's the area of a circle
The triangle is half of the largest square in the circle, and the square has an area of 30 square centimeters
15π
In a quarter circle, there is a triangle with an area of 15 square centimeters. What is the area of this circle?
This is a right triangle, and its two right sides are the two radii of the quarter circle. Therefore, the radius is the arithmetic square root of (15x2), that is √ 30s = 1 / 4 * r * r * 3.14 = 1 / 4 * 30 * 3.14 = 23.55 (cm2)