Urgent! answer and explain ! 98 points

Given: klmn is a parallelogram m? n=3m? k, lf ? kn , ld ? nm kf=2 cm, fn=4 cm find: lf, ld

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with

Atriangular field has sides of lengths 21, 39, and 41 yd. find the largest angle. (round your answer to the nearest degree.)