J = (a)^2(sin 2π/T+COS 2π/T​

Find the length of the following tangent segments to the circles centered at o and o' whose radii are 5 and 3 respectively and the distance between o and o' is 12. what is the tangent segment of cd?

Two corresponding sides of two similar triangles are 3cm and 5cm. the area of the first triangle is 12cm^2. what is the area of the second triangle?

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)