1. The sum of the radii of the two circles is 12 cm. The diameter of one circle is 10 cm. What is the area of the other circle in square cm? The sum of the radii of the two circles is 12 cm. The diameter of one circle is 10 cm. What is the area of the other circle? A flower bed is 5 meters, around it there is a 1 meter wide circular pebble path. How many square meters is the area of the path? Draw the largest semicircle in a square with a length of 6 decimeters and a width of 4 decimeters. How many decimeters is the circumference of the semicircle?

1. The sum of the radii of the two circles is 12 cm. The diameter of one circle is 10 cm. What is the area of the other circle in square cm? The sum of the radii of the two circles is 12 cm. The diameter of one circle is 10 cm. What is the area of the other circle? A flower bed is 5 meters, around it there is a 1 meter wide circular pebble path. How many square meters is the area of the path? Draw the largest semicircle in a square with a length of 6 decimeters and a width of 4 decimeters. How many decimeters is the circumference of the semicircle?

First problem: find the radius of another circle, 12x2 is the sum of two diameters, so the other diameter is 24-10 = 14cm, so the area is 7x7x π = 49 π second problem: it is equivalent to a big circle, which contains a circle, find the area of the ring, the area of the ring is the area of the big circle - the area of the small circle, the diameter of the big circle is 5 + 1 + 1 = 7, the diameter of the small circle is 5, so