Question

Prove $\overline{MN} \parallel \overline{PQ}$

score 307 · Answer 1 · 2026-04-15 03:17:42

307

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Prove $\overline{MN} \parallel \overline{PQ}$

Published on 15 Apr 2026 - 3:17

score 116 · Answer 2 · 2026-04-15 00:56:47

116

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Is there a $\triangle ABC$, with $D$ inside, such that $AB$, $BC$, $CA$, $AD$, $BD$, $CD$ are all integers, but only one is even?

Published on 15 Apr 2026 - 0:56

score 272 · Answer 3 · 2026-04-17 04:05:34

If in a Triangle ABC b , c , B ( where A ,B ,C denotes angles and a , b ,c denotes sides of the triangle ABC ) are given and b < c . Prove that

score 54 · Answer 4 · 2026-04-13 12:11:42

54

Views

Finding Cartesian coordinates of remaining vertices of triangle, given a vertex and an angle

Published on 13 Apr 2026 - 12:11

score 250 · Answer 5 · 2026-04-12 06:52:37

250

Views

Angle Chasing in geometry in triangle

Published on 12 Apr 2026 - 6:52

score 346 · Answer 6 · 2026-04-15 03:30:33

Let $A=(-1,0),B=(1,0), C$ be points in $\mathbb{R}^2.$ What is the locus of points $\{s\in\mathbb{R}^2:C$ lies on the angle bisector of $AsB$}?

score 54 · Answer 7 · 2026-04-12 06:52:08

54

Views

Analize given data about a triangle PQR and solve

Published on 12 Apr 2026 - 6:52

score 75 · Answer 8 · 2026-04-17 07:01:19

Let $p,q,r$ denote sides $QR, PR, PQ$ of $\Delta PQR$ respectively. Then prove that $p\cos^2 (R/2) +r \cos^2 (P/2) = \frac{p+q+r}{2}$

score 101 · Answer 9 · 2026-04-14 15:18:05

101

Views

The sum of the measures of the angles formed at the tips of a star.

Published on 14 Apr 2026 - 15:18

score 1.6k · Answer 10 · 2026-04-14 12:28:46

1.6k

Views

What's the most elementary way to solve this trigonometric problem?

Published on 14 Apr 2026 - 12:28

score 344 · Answer 11 · 2026-04-13 22:11:52

344

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If we know the congruence of the apex and the base of two isosceles, are both congruent triangles? (help with the proof)

Published on 13 Apr 2026 - 22:11

score 222 · Answer 12 · 2026-04-13 22:31:37

222

Views

Centroid and "Centre of mass"

Published on 13 Apr 2026 - 22:31

score 329 · Answer 13 · 2026-04-15 19:50:15

329

Views

Find exactly $3$ matching primitive Pythagorean triples for a given hypotenuse

Published on 15 Apr 2026 - 19:50

score 53 · Answer 14 · 2026-04-14 05:53:35

53

Views

How is this 20square root3 here?

Published on 14 Apr 2026 - 5:53

score 51 · Answer 15 · 2026-04-28 18:42:08

51

Views

Monotonicity of Riemannian Logarithm

Published on 28 Apr 2026 - 18:42

List Question

Prove $\overline{MN} \parallel \overline{PQ}$

Is there a $\triangle ABC$, with $D$ inside, such that $AB$, $BC$, $CA$, $AD$, $BD$, $CD$ are all integers, but only one is even?

If in a Triangle ABC b , c , B ( where A ,B ,C denotes angles and a , b ,c denotes sides of the triangle ABC ) are given and b < c . Prove that

Finding Cartesian coordinates of remaining vertices of triangle, given a vertex and an angle

Angle Chasing in geometry in triangle

Let $A=(-1,0),B=(1,0), C$ be points in $\mathbb{R}^2.$ What is the locus of points $\{s\in\mathbb{R}^2:C$ lies on the angle bisector of $AsB$}?

Analize given data about a triangle PQR and solve

Let $p,q,r$ denote sides $QR, PR, PQ$ of $\Delta PQR$ respectively. Then prove that $p\cos^2 (R/2) +r \cos^2 (P/2) = \frac{p+q+r}{2}$

The sum of the measures of the angles formed at the tips of a star.

What's the most elementary way to solve this trigonometric problem?

If we know the congruence of the apex and the base of two isosceles, are both congruent triangles? (help with the proof)

Centroid and "Centre of mass"

Find exactly $3$ matching primitive Pythagorean triples for a given hypotenuse

How is this 20square root3 here?

Monotonicity of Riemannian Logarithm

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