Question

The amount of unit squares being covered

score 36 · Answer 1 · 2014-09-04 09:49:21

The amount of unit squares being covered

Published on 04 Sep 2014 - 9:49

score 65 · Answer 2 · 2014-09-04 19:34:31

If a triangle has side lenghts $a,b,c$ where $c$ is the largest prove that its obtuse if $c^2>a^2+b^2$ and acute if $c^2<a^2+b^2$.

score 575 · Answer 3 · 2026-03-25 04:35:42

575

Views

Prove two triangles are congruent

Published on 25 Mar 2026 - 4:35

score 749 · Answer 4 · 2014-09-05 14:14:24

749

Views

finding median when all three sides are not given

Published on 05 Sep 2014 - 14:14

score 125 · Answer 5 · 2014-09-06 23:34:03

125

Views

Complex numbers and geometry

Published on 06 Sep 2014 - 23:34

score 1.6k · Answer 6 · 2014-09-07 15:29:35

1.6k

Views

Is ABC an equilateral triangle

Published on 07 Sep 2014 - 15:29

score 114 · Answer 7 · 2014-09-08 13:57:13

114

Views

How $\frac{\cos \alpha_1}{\sin \alpha}+\frac{\cos \beta_1}{\sin \beta}+\frac{\cos \gamma_1}{\sin \gamma}\leq\cot \alpha+\cot \beta+\cot \gamma$

Published on 08 Sep 2014 - 13:57

score 343 · Answer 8 · 2014-09-10 04:39:53

343

Views

Using Pascal's Triangle for Binomial Expansion.

Published on 10 Sep 2014 - 4:39

score 546 · Answer 9 · 2014-09-10 07:20:01

546

Views

Calculation of third vertices of a triangle given a vector that should be perpendicular to the triangle plane

Published on 10 Sep 2014 - 7:20

score 77 · Answer 10 · 2026-03-30 15:36:18

77

Views

Find the area of the triangle using $\frac12\|u\| \,\|v-\operatorname{proj}_u(v)\| $

Published on 30 Mar 2026 - 15:36

score 22.1k · Answer 11 · 2026-03-13 07:32:57

22.1k

Views

How to find coordinates of 3rd vertex of a right angled triangle when everything else is known?

Published on 13 Mar 2026 - 7:32

score 92 · Answer 12 · 2026-03-25 20:10:56

92

Views

Disprove the possibility of such a triangle.

Published on 25 Mar 2026 - 20:10

score 63 · Answer 13 · 2014-09-14 18:47:47

63

Views

Determine sides of obtuse triangle

Published on 14 Sep 2014 - 18:47

score 4.2k · Answer 14 · 2026-03-26 04:53:49

4.2k

Views

Prove sum of distance from triangle vertices to a point inside triangle is more than semiperimeter and less than perimeter

Published on 26 Mar 2026 - 4:53

score 37 · Answer 15 · 2014-09-17 14:21:28

37

Views

Relation of length of a projection of a point to a line

Published on 17 Sep 2014 - 14:21

List Question

The amount of unit squares being covered

If a triangle has side lenghts $a,b,c$ where $c$ is the largest prove that its obtuse if $c^2>a^2+b^2$ and acute if $c^2<a^2+b^2$.

Prove two triangles are congruent

finding median when all three sides are not given

Complex numbers and geometry

Is ABC an equilateral triangle

How $\frac{\cos \alpha_1}{\sin \alpha}+\frac{\cos \beta_1}{\sin \beta}+\frac{\cos \gamma_1}{\sin \gamma}\leq\cot \alpha+\cot \beta+\cot \gamma$

Using Pascal's Triangle for Binomial Expansion.

Calculation of third vertices of a triangle given a vector that should be perpendicular to the triangle plane

Find the area of the triangle using $\frac12\|u\| \,\|v-\operatorname{proj}_u(v)\| $

How to find coordinates of 3rd vertex of a right angled triangle when everything else is known?

Disprove the possibility of such a triangle.

Determine sides of obtuse triangle

Prove sum of distance from triangle vertices to a point inside triangle is more than semiperimeter and less than perimeter

Relation of length of a projection of a point to a line

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