Question

Prove that two tangents to a parabola are perpendicular if their point of intersection lies on the directrix

score 138 · Answer 1 · 2026-04-13 19:15:13

138

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Prove that two tangents to a parabola are perpendicular if their point of intersection lies on the directrix

Published on 13 Apr 2026 - 19:15

score 51 · Answer 2 · 2026-04-09 13:25:38

51

Views

Displacement of the excentral triangles

Published on 09 Apr 2026 - 13:25

score 43 · Answer 3 · 2026-04-11 13:52:15

43

Views

Use of directorial numbers to determine the equation of a sphere

Published on 11 Apr 2026 - 13:52

score 111 · Answer 4 · 2026-04-11 09:08:15

111

Views

Finding the angle $\angle C$ in the right triangle $\triangle ABC$

Published on 11 Apr 2026 - 9:08

score 38 · Answer 5 · 2026-04-14 19:01:51

Proof that the sum of the measures of the angles of any triangle is always the same ⟺ Euclid's fifth postulate (parallel postulate)

score 32 · Answer 6 · 2026-04-15 22:05:55

32

Views

How can one translate an orthogonal vector along parallel lines to a desired location?

Published on 15 Apr 2026 - 22:05

score 81 · Answer 7 · 2026-04-11 13:06:05

81

Views

Different centroid values for trapezoid using two different methods?

Published on 11 Apr 2026 - 13:06

score 53 · Answer 8 · 2026-04-13 17:41:25

53

Views

Construction of a triangle given 4 concyclic points

Published on 13 Apr 2026 - 17:41

score 132 · Answer 9 · 2026-04-12 21:01:03

132

Views

Inscribing a parabola tangent to two equilateral triangles

Published on 12 Apr 2026 - 21:01

score 43 · Answer 10 · 2026-04-28 17:05:31

43

Views

What is the asymptotic version of the solid angle formula in $d$ dimensions?

Published on 28 Apr 2026 - 17:05

score 67 · Answer 11 · 2026-04-09 12:58:24

67

Views

Application of Brianchon's theorem problem

Published on 09 Apr 2026 - 12:58

score 42 · Answer 12 · 2026-04-13 09:07:04

42

Views

Looking for Euclid's Elements with mathematical commentary

Published on 13 Apr 2026 - 9:07

score 260 · Answer 13 · 2026-04-14 15:40:09

260

Views

Geometric construction of a triangle given 2 lines and a point

Published on 14 Apr 2026 - 15:40

score 50 · Answer 14 · 2026-04-10 09:44:23

50

Views

Can someone explain why two trigonometric functions are equal when plotted, but not when put into the calculator?

Published on 10 Apr 2026 - 9:44

score 549 · Answer 15 · 2026-04-16 08:35:48

549

Views

book recommendation for Euclidean geometry without coordinates or any modern math (math that has been discovered after the 16th century.)

Published on 16 Apr 2026 - 8:35

List Question

Prove that two tangents to a parabola are perpendicular if their point of intersection lies on the directrix

Displacement of the excentral triangles

Use of directorial numbers to determine the equation of a sphere

Finding the angle $\angle C$ in the right triangle $\triangle ABC$

Proof that the sum of the measures of the angles of any triangle is always the same ⟺ Euclid's fifth postulate (parallel postulate)

How can one translate an orthogonal vector along parallel lines to a desired location?

Different centroid values for trapezoid using two different methods?

Construction of a triangle given 4 concyclic points

Inscribing a parabola tangent to two equilateral triangles

What is the asymptotic version of the solid angle formula in $d$ dimensions?

Application of Brianchon's theorem problem

Looking for Euclid's Elements with mathematical commentary

Geometric construction of a triangle given 2 lines and a point

Can someone explain why two trigonometric functions are equal when plotted, but not when put into the calculator?

book recommendation for Euclidean geometry without coordinates or any modern math (math that has been discovered after the 16th century.)

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