Question

CD is height of right-angled triangle ABC, M and N are midpoints of CD and BD: prove AM⊥CN

score 93 · Answer 1 · 2014-11-13 18:30:49

93

Views

CD is height of right-angled triangle ABC, M and N are midpoints of CD and BD: prove AM⊥CN

Published on 13 Nov 2014 - 18:30

score 59 · Answer 2 · 2014-11-13 18:57:40

59

Views

Is any property of orthocenter related in this question?

Published on 13 Nov 2014 - 18:57

score 1k · Answer 3 · 2014-11-14 21:23:59

1k

Views

Triangles, flagpoles and heights, oh my!

Published on 14 Nov 2014 - 21:23

score 2.3k · Answer 4 · 2014-11-16 00:58:58

2.3k

Views

Value of the angle in isosceles triangle.

Published on 16 Nov 2014 - 0:58

score 11.6k · Answer 5 · 2014-11-16 06:24:44

11.6k

Views

Find the Angle BAC

Published on 16 Nov 2014 - 6:24

score 179 · Answer 6 · 2026-03-26 07:39:13

179

Views

Can the $9$ point circle be generalized to $n$-gons of $n\gt3$?

Published on 26 Mar 2026 - 7:39

score 1k · Answer 7 · 2014-11-17 23:46:01

1k

Views

Are two triangles similar if they each have a side with equal length and an equal angle?

Published on 17 Nov 2014 - 23:46

score 259 · Answer 8 · 2014-11-18 08:05:11

259

Views

Proof of a certain lemma in geometry

Published on 18 Nov 2014 - 8:05

score 112 · Answer 9 · 2026-03-29 03:28:29

112

Views

If $|\alpha|\leq 1$ and $|\beta|\leq 1$, prove that $|\alpha+\beta|\leq |1+\overline{\alpha}\beta|$

Published on 29 Mar 2026 - 3:28

score 1k · Answer 10 · 2014-11-20 14:10:57

1k

Views

Find the sum of the lengths of line segments $BD$ and $CE$

Published on 20 Nov 2014 - 14:10

score 753 · Answer 11 · 2014-11-20 16:59:03

753

Views

Given the area and perimeter of a triangle, find its coordinates

Published on 20 Nov 2014 - 16:59

score 7k · Answer 12 · 2026-03-29 08:44:46

7k

Views

Dealing with negative areas-- coordinate geometry

Published on 29 Mar 2026 - 8:44

score 1.9k · Answer 13 · 2014-11-21 07:07:12

1.9k

Views

Calculate point P(x,y) in a circle given a radius and angle degree

Published on 21 Nov 2014 - 7:07

score 348 · Answer 14 · 2026-03-26 04:53:24

348

Views

Given $a,b,c$ are the sides of a triangle. Prove that $\frac{a}{b+c}+\frac{b}{c+a}+\frac{c}{a+b}<2$

Published on 26 Mar 2026 - 4:53

score 994 · Answer 15 · 2026-03-25 21:49:44

994

Views

Finding the length of the side of the equilateral triangle

Published on 25 Mar 2026 - 21:49

List Question

CD is height of right-angled triangle ABC, M and N are midpoints of CD and BD: prove AM⊥CN

Is any property of orthocenter related in this question?

Triangles, flagpoles and heights, oh my!

Value of the angle in isosceles triangle.

Find the Angle BAC

Can the $9$ point circle be generalized to $n$-gons of $n\gt3$?

Are two triangles similar if they each have a side with equal length and an equal angle?

Proof of a certain lemma in geometry

If $|\alpha|\leq 1$ and $|\beta|\leq 1$, prove that $|\alpha+\beta|\leq |1+\overline{\alpha}\beta|$

Find the sum of the lengths of line segments $BD$ and $CE$

Given the area and perimeter of a triangle, find its coordinates

Dealing with negative areas-- coordinate geometry

Calculate point P(x,y) in a circle given a radius and angle degree

Given $a,b,c$ are the sides of a triangle. Prove that $\frac{a}{b+c}+\frac{b}{c+a}+\frac{c}{a+b}<2$

Finding the length of the side of the equilateral triangle

Trending Questions

Popular # Hahtags

Popular Questions