Explain how to find the surface area of a rectangular pyramid

Find the dimensions and area of the largest rectangle that can be inscribed in the upper half of the ellipse. (give your answers in terms of a and b. enter the dimensions as a comma-separated list.)

Which of the following is the main energy source for the sun? a. fission of hydrogen b. fusion of hydrogen c. fusion of helium d. fission of iron

What characteristics of hv2112 make it the best candidate to be classified as a thorne-zytkow object?