Question

ABCD is a parallelogram find the length of DF if d is equal to 6.8 CM BC is equal to 18 cm BC is equal to 15 cm and also be perpendicular a b and D F perpendicular BC

Answer 1

Answer:

Step-by-step explanation:

Let the height from A to BC be AE.

LET THE HEIGHT FROM C TO AB BE CF

AB=CD=15CM (OPPOSITE SIDES OF A PARALLELOGRAM ARE EQUAL)

BC=AD=18CM (            "       "           " "       "                            "    "        )

AE=9CM

AREA OF PARALLELOGRAM=BASE X PERPENDICULAR HEIGHT FROM BASE

AREA= (18 X 9)CM²= 162CM²

II CASE

ARE OF IIGM=BASE X PERPENDICULAR TO BASE HEIGHT

AREA= (15 X CF)CM²⇒162/15=CF

CF=10.8CM