1. If AC and BD are the diagonals of a parallelogram ABCD show that AC? +BD = 2(AB + AD'). b AC?-BD = 4 AB - AD. by vector method:​

Five dinosaurs go for a walk and come across some lovely chicken wings. their names are rexy, bronto, steggy, paly, and terry. there are exactly 5 dozen wings(equal enough for each dino to have a dozen right? ); however, terry is on a diet and he only eats 6 wings. if paly eats 2 more than terry, steggy eats 4 more than paly, and bronto and rexy eat the same amount because they are really hungry from not eating all day, how many chicken wings did each dino eat?

The larger of two number is 4 less than twice the smaller number. the sum is 41. find the numbers

Use δjkl and δmpn to determine whether don's claim is true or false. which of the following should don use to prove the triangles are similar? sss sas aas aa