Which of the following are necessary when proving that opposite sides of a parallelogram are congruent? . a) corresponding parts of similar triangles are similar. b) alternate interior angles are congruent. c) alternate interior angles are supplementary. d) corresponding parts of congruent triangles are congruent

In a certain pentagon, the interior angles are a,b,c,d,e where a,b,c,d,e are integers strictly less than 180. ("strictly less than 180" means they are "less than and not equal to" 180.) if the median of the interior angles is 61 and there is only one mode, then what are the degree measures of all five angles?

The probability that a college student belongs to a health club is 0.3. the probability that a college student lives off-campus is 0.4. the probability that a college student belongs to a health club and lives off-campus is 0.12. find the probability that a college student belongs to a health club or lives off-campus. tip: p(a or b) = p(a) + p(b) - p(a and b) 0.54 0.58 0.70 0.82

Simply 8x squared + 5(7x squared- x) - 2x =