Question

From the following figure,
If ∆ABC - ∆ADE, then find
the value of 'x'.
Ac=2cm + 4cm
BC=x 5cm
​

Answer 1

Answer:

ABCD is a square. △BCE is described on side BC is similar to △ACF desctibed on diagonal AC.

Since ABCD is a square. Therefore,

AB=BC=CD=DA and AC=

2

BC [∵Diagonal=

2

(side)]

Now, △BCE∼△ACF

⇒

Area(△ACF)

Area(△BCE)

=

AC

2

BC

2

⇒

Area(△ACF)

Area(△BCE)

=

(

2

BC)

2

BC

2

=

2

1

⇒ Area(△BCE)=

2

1

Area(△ACF)