Calculator programs · Measures, Shape and Space
Circle and line
The centre and radius of x² + y² + Dx + Ey + F = 0, then where a line y = mx + c meets it.
When it helps
Circles come up on both papers, in 11 of the last 14 years with a line: the centre and radius, whether a line cuts, touches or misses (the sign of Δ), and the points where they meet.
At each prompt
- D, the coefficient of x, E, the coefficient of y, F, the constant term, m, the slope of the line, c, its y-intercept
- Size
- 118 bytes
- Keying in
- about 5–8 min to key in (189 presses)
- Run mode
- COMP
- Memories it overwrites
- A, B, C, D, X, Y, M