Solver PLOT any circle and describe it
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==section input Plot a circle with a center in point (*[input 10 x=2], *[input 10 y=1]), and radius *[input r=4] ==section solution perl $z = 1; my $d = 2*$r; my $pi = 3.141592693989397; my $area = $pi*$r*$r; my $perimeter = $pi*$d; print " Diameter: {{{d = 2r = 2*$r = $d}}}. Area: {{{area = pi\\r^2 = pi*$r^2 = $area}}} Perimeter: {{{perimeter = 2\\pi\\r = 2\\pi*$r = $perimeter}}} {{{ drawing( 300, 300, -10, 10, -10, 10, grid( 1 ), red( circle( $x, $y, $r ) ), blue( circle( $x, $y, 0.1 ) ), blue( circle( $x, $y, 0.2 ) ) ) }}} "; ==section output z ==section check x=2 y=3 z=1 ==section practice $x = randint( -2, 4 ); $y = randint( -2, 4 ); $r = randint( 1, 7 );
