(1)S三角形OPQ=1/2*OP*OQ
=1/2*√2t*(8-t)
=4√2t-(√2/2)t²
(2)S四边形OPBQ=S梯形OQBA-S三角形BPA=1/2*(OQ+AB)*OA-1/2OP*AB
=8根号2 * 1/2 * (8-根号2 * t) + 2t * 8 *1/2
=32根号2
(1)S三角形OPQ=1/2*OP*OQ
=1/2*√2t*(8-t)
=4√2t-(√2/2)t²
(2)S四边形OPBQ=S梯形OQBA-S三角形BPA=1/2*(OQ+AB)*OA-1/2OP*AB
=8根号2 * 1/2 * (8-根号2 * t) + 2t * 8 *1/2
=32根号2