List questions from triangles

Published on 30 Jul 2016 - 19:54

7.7k

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Proving that the sum of any two sides of the triangle is greater than the third side

Published on 31 Jul 2016 - 10:07

92

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Circle Geometry, Equilateral Triangles

Published on 01 Aug 2016 - 9:35

495

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Find the height of the triangle

Published on 04 Apr 2026 - 6:10

242

Views

Find the point that minimises the sum of the angles from three points to that point on the surface of a sphere

Published on 28 Mar 2026 - 8:40

1.2k

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Determine if a point is in a triangle?

Published on 29 Mar 2026 - 15:14

134

Views

Geometry: Show that two lines are perpendicular

Published on 07 Aug 2016 - 22:13

48

Views

Triangle Bisector

Published on 09 Aug 2016 - 19:15

59

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Angle Bisectors

Published on 09 Aug 2016 - 19:39

888

Views

Solving Isosceles Triangle with all angles and perimeter

Published on 09 Aug 2016 - 23:42

149

Views

How do we prove that $r_1^2+r_2^2+r_3^2+r_4^2=16R^2-a^2-b^2-c^2$

Published on 10 Aug 2016 - 15:22

2.8k

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Perpendicular Medians

Published on 12 Aug 2016 - 15:47

269

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Find the area of the triangle AHC

Published on 13 Aug 2016 - 4:56

222

Views

Orthocentre and circumcentre at $(9,5)$ and $(0,0)$

Published on 04 Apr 2026 - 7:52

66

Views

Finding lengths of a triangle with only one angle and its length.

Published on 13 Aug 2016 - 20:37

List Question

Please help me understand this proof.

Proving that the sum of any two sides of the triangle is greater than the third side

Circle Geometry, Equilateral Triangles

Find the height of the triangle

Find the point that minimises the sum of the angles from three points to that point on the surface of a sphere

Determine if a point is in a triangle?

Geometry: Show that two lines are perpendicular

Triangle Bisector

Angle Bisectors

Solving Isosceles Triangle with all angles and perimeter

How do we prove that $r_1^2+r_2^2+r_3^2+r_4^2=16R^2-a^2-b^2-c^2$

Perpendicular Medians

Find the area of the triangle AHC

Orthocentre and circumcentre at $(9,5)$ and $(0,0)$

Finding lengths of a triangle with only one angle and its length.

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