Question

Find all integer sided triangles whose area equals their perimeter.

score 1k · Answer 1 · 2026-04-14 22:30:23

1k

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Find all integer sided triangles whose area equals their perimeter.

Published on 14 Apr 2026 - 22:30

score 539 · Answer 2 · 2026-04-16 12:15:10

539

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. Find the projection of the triangle on the coordinate planes.

Published on 16 Apr 2026 - 12:15

score 127 · Answer 3 · 2026-04-17 03:46:40

127

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Estimate for $\frac{1}{\Delta}\sqrt{abc(a+b+c)}$

Published on 17 Apr 2026 - 3:46

score 153 · Answer 4 · 2026-04-18 10:25:09

153

Views

Triangle Area problem

Published on 18 Apr 2026 - 10:25

score 286 · Answer 5 · 2026-04-14 22:55:44

286

Views

Prove that $\measuredangle AQP+\measuredangle NAP=90^o$

Published on 14 Apr 2026 - 22:55

score 558 · Answer 6 · 2026-04-11 02:46:02

558

Views

Alternative area of a triangle formula

Published on 11 Apr 2026 - 2:46

score 124 · Answer 7 · 2026-04-14 17:17:53

124

Views

Proof of the identity: $c\sin \frac{A-B}{2} \equiv (a-b) \cos \frac{C}{2}$

Published on 14 Apr 2026 - 17:17

score 103 · Answer 8 · 2026-04-16 23:34:31

103

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Find triangle $ABC$ satisfies $1+2\sqrt{2}\sin\frac{B}{2}\sin\frac{C}{2}=\cos B+\cos C$

Published on 16 Apr 2026 - 23:34

score 304 · Answer 9 · 2026-04-13 00:09:50

304

Views

How to scale a triangle such that the distance between original edges and new edges are equal?

Published on 13 Apr 2026 - 0:09

score 525 · Answer 10 · 2026-04-15 05:50:34

525

Views

What is the least number of (fixed) parameters I can ask for, when calculating area of a triangle of unknown type?

Published on 15 Apr 2026 - 5:50

score 1k · Answer 11 · 2026-04-18 15:18:45

1k

Views

The case of Captain America's shield: a variation of Alhazen's Billard problem

Published on 18 Apr 2026 - 15:18

score 499 · Answer 12 · 2026-04-14 00:44:54

499

Views

Geometry - angle bisector, circumcircle: SL olympiad

Published on 14 Apr 2026 - 0:44

score 1.2k · Answer 13 · 2026-04-15 08:25:41

1.2k

Views

Find the longest side of the triangle.

Published on 15 Apr 2026 - 8:25

score 2.8k · Answer 14 · 2026-04-14 06:39:07

2.8k

Views

Using Tan to find the area of a triangle

Published on 14 Apr 2026 - 6:39

score 95 · Answer 15 · 2026-04-17 01:18:08

95

Views

Prove by vector method that $p_1+p_2=p_3$

Published on 17 Apr 2026 - 1:18

List Question

Find all integer sided triangles whose area equals their perimeter.

. Find the projection of the triangle on the coordinate planes.

Estimate for $\frac{1}{\Delta}\sqrt{abc(a+b+c)}$

Triangle Area problem

Prove that $\measuredangle AQP+\measuredangle NAP=90^o$

Alternative area of a triangle formula

Proof of the identity: $c\sin \frac{A-B}{2} \equiv (a-b) \cos \frac{C}{2}$

Find triangle $ABC$ satisfies $1+2\sqrt{2}\sin\frac{B}{2}\sin\frac{C}{2}=\cos B+\cos C$

How to scale a triangle such that the distance between original edges and new edges are equal?

What is the least number of (fixed) parameters I can ask for, when calculating area of a triangle of unknown type?

The case of Captain America's shield: a variation of Alhazen's Billard problem

Geometry - angle bisector, circumcircle: SL olympiad

Find the longest side of the triangle.

Using Tan to find the area of a triangle

Prove by vector method that $p_1+p_2=p_3$

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