Array ( [0] => Array ( [title] => L29A [link] => https://www.youtube.com/embed/kAa3k5pA5q4 ) [1] => Array ( [title] => L29B [link] => https://www.youtube.com/embed/soms6HkXHbw ) [2] => Array ( [title] => L29C [link] => https://www.youtube.com/embed/GeW-0Qfe5YE ) ) 國立清華大學開放式課程OpenCourseWare(NTHU, OCW) - 第29講 P-sided polygon