Describe the surface in double-struck r3 represented by the equation x + y = 3. this is the set {(x, y, 3 − x − y)|x is in double-struck r, y is in double-struck r} which is a vertical plane that intersects the xy-plane in the line y = 3 − x, z = 0.

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.