The base area of a triangular pyramid is28 in and the height is 12 in. What is the volume of this pyramid

Hi, can anyone show me how to do this problem? 100 points for this. in advance

Given: lines a and b are parallel and line c is a transversal. prove: 2 is supplementary to 8 what is the missing reason in the proof? statement reason 1. a || b, is a transv 1. given 2. ∠6 ≅ ∠2 2. ? 3. m∠6 = m∠2 3. def. of congruent 4. ∠6 is supp. to ∠8 4. def. of linear pair 5. ∠2 is supp. to ∠8 5. congruent supplements theorem corresponding angles theorem alternate interior angles theorem vertical angles theorem alternate exterior angles theorem

Which shows the first equation written in slope-intercept form? 1/2 (2y + 10) = 7x