10

$10\sqrt{2}$

20

$20\sqrt{2}$

$15\sqrt{2}$

3/2

1/5

1/2

1

-1/2

420

560

720

2520

3360

{3,4,5,6}

{2,3,4}

{3,4 }

{4,5}

{4}

$4\mathrm{\pi }$

$8\mathrm{\pi }$

$12\mathrm{\pi }$

$16\mathrm{\pi }$

$4\sqrt{2}\mathrm{\pi }$

1

3/2

2/3

1/6

1/3

y = mx +b

x = my + b

y = m (x -b)

y = mx -b

x = my -b

$-\mathrm{\pi }/4$

$-\mathrm{\pi }/2$

$\mathrm{\pi }/4$

$\mathrm{\pi }/2$

$\mathrm{\pi }/6$

1/2

1/5

1/9

1/10

1/90

${\mathrm{x}}^2+\mathrm{x}+1=0$

${\mathrm{x}}^2-\mathrm{x}+1=0$

${\mathrm{x}}^2-\mathrm{x}-1=0$

${\mathrm{x}}^2+\mathrm{x}+2=0$

${\mathrm{x}}^2-\mathrm{x}+2=0$