Abcd is a parallelogram. a is the point (2,5), b is the point (8,8) and the diagonals intersect at (3.5, 2.5). what are the coordinates of c and d? how do i work this out?

Stefano accidentally dropped his sunglasses off the edge of a canyon as he was looking down. the height, h(t), in meters (as it relates to sea level), of the sunglasses after t seconds, is shown in the table. during its descent, the pair of sunglasses passed by a climber in the canyon 6 seconds after stefano dropped them. to the nearest meter, what is difference in elevation between stefano and the climber? 166 meters 176 meters 230 meters 240 meters its b.176 i took the test 166 is wrong and 176 is correct

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.