Description: Lemma for theorems about intersections of lines and circles in a real Euclidean space of dimension 2 . (Contributed by AV, 3-May-2023)
Ref | Expression | ||
---|---|---|---|
Assertion | itsclc0lem2 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simp1 | |
|
2 | simp3 | |
|
3 | 1 2 | remulcld | |
4 | 3 | adantr | |
5 | simpl2 | |
|
6 | resqrtcl | |
|
7 | 6 | adantl | |
8 | 5 7 | remulcld | |
9 | 4 8 | resubcld | |
10 | 9 | 3adant3 | |
11 | simp3l | |
|
12 | simp3r | |
|
13 | 10 11 12 | redivcld | |