Question

Triangle DEF is isosceles with DE DE 20 cm and EF 24 cm shown in
the diagram. A rectangle KLMN is drawn inside the triangle with KL on EF, and
N and Mon DE and DF respectively.
i.
20 cm
20 cm
If KL 2 x cm, then show that
the area A cm2 of the rectangle
8x (12 - x)
is given by A
3
Hence find the value of x for
which A is a maximum.
2.8 cm
E
L
F
24 cm​

Answer 1

I

DON'T

KNOW

PLEASE

ASK

TO

SOMEONE

WHO

HELP

YOU

FOR

THIS

QUESTION