直徑兩點求圓方程
| 3 | K | - | 2 | - | K | x² | ) |
| ( | A | + | 0 | B | + | C | ) |
| ÷ | 2 | + | K | ( | K | - | 2 |
| ) | ( | B | + | D | ) | + | K |
| ( | K | - | 1 | ) | ( | A | C |
| + | B | D | ) | ÷ | 2 | - | K |
| - | 1 | + | ( | K | + | 1 | STO F1 |
例題: 直徑的兩個端點為(0,0)及(4,6)，求圓方程。
按 2ndF DEL (必要) 再按 RCL F1 ALGB 0 = 0 = 4 = 6 = (顯示-4) = (顯示-6) = (顯示0)
所以圓方程為: x² + y²
- 4x - 6y = 0
相關資料:
圓形的圓心及半徑 (Centre and radius of a circle)
圓心及半徑求圓方程 (Equation of circle by centre and radius)
已知斜率求圓的切線 (Tangent to Circle with given slope)
外點至圓的切線斜率 (Slope of tangent to circle from external point)
直線與圓形的交點 (Intersection points of line and circle)
三點求圓方程 (應用內置聯立三元一次方程 ) (Equation of circle from three points)