List questions from triangles

Published on 14 Apr 2026 - 5:20

71

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In $\triangle ABC$, if $b^2 = a(c+a)$ and $c^2 = b(a+b)$, then $\cos A\cos B\cos C = -\frac{1}{8}$

Published on 17 Apr 2026 - 2:21

28

Views

Problem related to triangle circumcentre

Published on 13 Apr 2026 - 6:17

189

Views

Deriving area of 2D shapes

Published on 13 Apr 2026 - 17:52

154

Views

Calculate 2nd and 3rd coordinate of a triangle

Published on 11 Apr 2026 - 22:37

4.4k

Views

Finding a side of triangle with only 2 angles and 1 side; and how to enter on calculator

Published on 13 Apr 2026 - 14:49

385

Views

Maximum value of diagonals angle in parallelogram

Published on 10 Apr 2026 - 18:36

143

Views

Finding length of side on right triangle on mercator projection

Published on 12 Apr 2026 - 12:45

1.1k

Views

How to get intersection points between a plane and a triangle (3D)?

Published on 11 Apr 2026 - 9:07

1.3k

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Conformal mapping from upper half plane to a triangle

Published on 13 Apr 2026 - 22:39

1.4k

Views

Rotate triangle ABC around the origin

Published on 14 Apr 2026 - 22:18

172

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Largest possible area of the triangle ABC such that AB≤2, BC≤3, AC≤4.

Published on 15 Apr 2026 - 1:00

162

Views

Draw a line that cuts a triangle with minimal area

Published on 14 Apr 2026 - 17:46

2.8k

Views

Where does the $-2ab$ term come from in the cosine law?

Published on 13 Apr 2026 - 10:03

268

Views

How can I prove that two lines intersect at a circle?

Published on 30 Mar 2026 - 4:38

List Question

Find $AC$ WITHOUT using Cosine law...

In $\triangle ABC$, if $b^2 = a(c+a)$ and $c^2 = b(a+b)$, then $\cos A\cos B\cos C = -\frac{1}{8}$

Problem related to triangle circumcentre

Deriving area of 2D shapes

Calculate 2nd and 3rd coordinate of a triangle

Finding a side of triangle with only 2 angles and 1 side; and how to enter on calculator

Maximum value of diagonals angle in parallelogram

Finding length of side on right triangle on mercator projection

How to get intersection points between a plane and a triangle (3D)?

Conformal mapping from upper half plane to a triangle

Rotate triangle ABC around the origin

Largest possible area of the triangle ABC such that AB≤2, BC≤3, AC≤4.

Draw a line that cuts a triangle with minimal area

Where does the $-2ab$ term come from in the cosine law?

How can I prove that two lines intersect at a circle?

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