Question

A B С D E 3. Rectify the error, if any. Look at the figure shown alongside. C is the midpoint of AE, B is the midpoint of AC and D is the midpoint of CE. a. AB + BC = AD b. BE=CD c. AE = AC + BE d. A, B, C, D and E are not collinear.​

Answer 1

Answer:

In right △AED, using Pythagoras theorem,

AD

2

=AE

2

+DE

2

=9

2

+12

2

=81+144=225cm

⇒AD=

225

=15cm=diameter

Required area = ar. ABCD + ar. semi-circle - ar △AED=(20×15)+

2

1

×

7

22

×(

2

15

)

2

−

2

1

×9×12

=300+88.3928−54=334.3928cm

2