Step
*
2
1
1
of Lemma
isosceles-sep-implies-lsep
1. e : EuclideanPlane
2. a : Point
3. b : Point
4. x : Point
5. xa ≅ xb
6. a ≠ b
7. ∀m:{m:Point| a=m=b} . m ≠ x
8. d : Point
9. a=d=b
10. a ≠ d
11. b ≠ d
12. d ≠ x
13. q : Point
14. p : Point
15. ab ⊥d pd
16. ab ⊥d qd
17. p leftof ab
18. q leftof ba
19. Colinear(x;p;d)
20. q ≠ d ∧ p ≠ d
21. q leftof bd
22. p leftof db
⊢ x # ab
BY
{ (ProveGeoLSep THENA Auto) }
Latex:
Latex:
1. e : EuclideanPlane
2. a : Point
3. b : Point
4. x : Point
5. xa \mcong{} xb
6. a \mneq{} b
7. \mforall{}m:\{m:Point| a=m=b\} . m \mneq{} x
8. d : Point
9. a=d=b
10. a \mneq{} d
11. b \mneq{} d
12. d \mneq{} x
13. q : Point
14. p : Point
15. ab \mbot{}d pd
16. ab \mbot{}d qd
17. p leftof ab
18. q leftof ba
19. Colinear(x;p;d)
20. q \mneq{} d \mwedge{} p \mneq{} d
21. q leftof bd
22. p leftof db
\mvdash{} x \# ab
By
Latex:
(ProveGeoLSep THENA Auto)
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