Perswgi panjang (2+2akar3) lebar (4-2akar3) luasnya adalah

[tex]l = p \times l \\ l = (2 + 2 \sqrt{3})(4 - 2 \sqrt{3} ) \\ = 8 - 4 \sqrt{3} + 6 \sqrt{3} - 4 \times 3 \\ = 8 + 2 \sqrt{3} - 12 \\ = 2 \sqrt{3} - 4[/tex]

[tex]luas = p \times l \\ =( 2 + 2 \sqrt{3} ) \times (4 - 2 \sqrt{3)} \\ = 8 - 4 \sqrt{3} + 8 \sqrt{3} - 12 \\ = 4 \sqrt{3} - 4[/tex]