Question

Two circles C1 and C2, touch each other externally, and the line l is a common tangent. the line m is parallel to l and touches the two circles C1 and C3. The three circles are mutually tangent if the radius of C2 is 9 and if the radius of C3 is 4, what is the radius of C1?

Answer 1

Answer:

the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product.