The radius R of a sphere is 9.8 cm. Calculate the sphere's surface area A.
Use the value 3.14 for 1, and round your answer to the nearest tenth.

Which is a logical conclusion based on the given information? a. figure abcd is a rhombus by the definition of a rhombus. b. segment ac is congruent to segment dc by cpctc. c. angle acb is congruent to angle adc by the angle-side-angle theorem. d. triangle acd is congruent to triangle cab by the hypotenuse-leg theorem.