https://youtu.be/RvHd5h2pkuA

八下數學 / 三角形的邊角關係

https://www.junyiacademy.org/course-compare/math-grade-8-a/g-mjssj/g08-mjssj8c

南一3-5

https://www.junyiacademy.org/course-compare/n-m8a/n-m8b-v099ch3/n-m8b-v099ch3-4#topic-page-anchor-n-m8b-v099ch3-4-2

翰林3-4

https://www.junyiacademy.org/course-compare/h-m8a/h-m8b-v108ch3/h-m8b-v108ch3-4

康軒3-5

https://www.junyiacademy.org/course-compare/k-m8a/k-m8b-v108ch3/k-m8b-v108ch3-5

因材網(因材網-數學領域(八年級-康軒版)-第九單元、三角形的邊角關係)

https://www.junyiacademy.org/partner/adl/adl-math-pre/adl-math-pre-u13