Question

ABCD is a parallelogram Ae is bisects DC and CF bisects AD.if ab = 18 cm = 4 cm and CF = 6 CM then ad =​

Answer 1

Step-by-step explanation:

Area of parallelogram =area of parallelogram

b×h=b×h

Dc×AE =AD×CF

16×8=AD×10

16×8÷10=AD

1.6×8=AD

12.8=AD

Answer 2

Question :-

In figure, ABCD is a parallelogram, AE ⊥ DC and CF ⊥ AD. If AB = 16 cm, AE = 8 cm and CF = 10 cm, find AD.

Answer :-

We have, AE ⊥ DC and AB = 16 cm

∵ AB = CD [Opposite sides of parallelogram]

∴ CD = 16 cm

Now, area of parallelogram ABCD = CD x AE

= (16 x 8) cm2 = 128 cm2 [∵ AE = 8 cm]

Since, CF ⊥ AD

∴ Area of parallelogram ABCD = AD x CF

⇒ AD x CF = 128 cm

⇒ AD x 10 cm = 128 cm2 [∵ CF= 10 cm]

⇒ AD = 128/10 cm = 12.8 cm 10

Thus, the required length of AD is 12.8 cm

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