三角形ABC中,角BAC=45,过C作CD'垂直BA于D',CD'^2=AC^2/2=(AD^2+CD^2)/2
AD垂直BC于D,三角形ADB相似于三角形CD'B
AD/CD'=BA/BC
AD^2/(CD')^2=BA^2/BC^2
AD^2*100=(CD')^2*(BA)^2
100AD^2=[(AD^2+CD^2)/2] * [AD^2+BD^2]
100AD^2=(AD^2+16)(AD^2+36)/2
200AD^2=AD^4+52AD^2+16*36
AD^4-148AD^2=-16*36
(AD^2-72)^2=72^2-16*36=2*64*36
AD^2=72-48√2
AD=2√(18-12√2)
本文地址: http://www.goggeous.com/e/1/1166479
文章来源:天狐定制
版权声明:除非特别标注,否则均为本站原创文章,转载时请以链接形式注明文章出处。
2025-01-08职业培训
2025-01-08职业培训
2025-01-08职业培训
2025-01-08职业培训
2025-01-08职业培训
2025-01-08职业培训
2025-01-08职业培训
2025-01-08职业培训
2025-01-08职业培训
2025-01-08职业培训
2025-01-03 13:00:54职业培训
2025-01-03 13:00:53职业培训
2025-01-03 13:00:52职业培训
2025-01-03 13:00:51职业培训
2025-01-03 13:00:43职业培训
2025-01-03 13:00:41职业培训
2025-01-03 13:00:41职业培训
2025-01-03 13:00:39职业培训
2025-01-03 13:00:39职业培训
2025-01-03 13:00:38职业培训
2024-12-22 05:46职业培训
2024-12-07 00:52职业培训
2024-12-22 08:17职业培训
2024-12-04 05:32职业培训
2024-12-04 23:37职业培训
2024-12-17 20:32职业培训
2024-11-26 09:09职业培训
2024-12-15 14:38职业培训
2024-12-11 00:22职业培训
2024-12-14 05:53职业培训
扫码二维码
获取最新动态