The answer would be 17/12
Answer:
(1) All sides are equal/parell (2) All angles measure 90 degrees. (3) The diagonal is angles
I belive
ED=38
Ea=142
BDC=142
Consider, pls, the suggested option:
1. formula is: a*b=|a||b|cos(ab);
2. a*b=40*60*cos135°=2400/√2 (≈1697,0563).
