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kalo salah mohon ralat. ty :)
keliling:
3x+1+2x+2+2x
=7x+3
Luas:
\frac{2x+2}{2} . 2x [/tex]
=4x
(3x+1)²=(2x+2)²+(2x)²
9x²+1+6x=4x²+4x²+4+8x
x²-2x-3=0
(x-3)(x+1)=0
x=3
x=-1(salah karena negative)
x=3
keliling=3x+1+2x+2+2x
=7x+3
x=3⇒7.3+3=21+3=24
keliling=24cm
luas=a x t/2
=sa x st/2
=2x . 2x+2
=4x² + 4x
x=3⇒36+12=48
luas=48cm²