2x=16
x=8
d − odległość S(1,−1) od prostej
| |1*1−2*(−1)+3| | ||
d = | = | |
| √12+(−2)2 |
| |1+2+3| | 6 | ||
= | |||
| √1+4 | √5 |
| 36 | 320+36 | 356 | ||||
r2 = 64+ | = | = | ||||
| 5 | 5 | 5 |
| √356 | ||
r = | ||
| √5 |
odległość "d" punktu S od cięciwy:
| |1*1−2(−1)+3| | 6 | |||
d= | = | |||
| √12+22 | √5 |
| 36 | 356 | |||
r2= d2 +82 = | +64= | |||
| 5 | 5 |
| 356 | ||
o: ( x−1)2 + ( y+1)2= | ||
| 5 |