Question

How to relate the perpendicular line that touches a circle and an inscribed triangle with its sides/area?

score 433 · Answer 1 · 2016-09-22 03:15:26

433

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How to relate the perpendicular line that touches a circle and an inscribed triangle with its sides/area?

Published on 22 Sep 2016 - 3:15

score 761 · Answer 2 · 2016-09-22 04:38:36

761

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Proof that rectangle triangle is isosceles

Published on 22 Sep 2016 - 4:38

score 314 · Answer 3 · 2016-09-22 13:33:21

314

Views

Prove that :$[BCA']^2+[CAB']^2+[ABC']^2=[ABC]^2$, where [•] denote the area.

Published on 22 Sep 2016 - 13:33

score 989 · Answer 4 · 2016-09-23 16:10:01

If $P$ is any point on a straight line drawn through the vertex $A$ of an isosceles triangle $ABC$, parallel to the base, prove that $PB+PC>AB+AC$

score 2k · Answer 5 · 2016-09-24 04:21:48

2k

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How to find the included angle between the given known sides

Published on 24 Sep 2016 - 4:21

score 3.7k · Answer 6 · 2026-03-28 17:04:54

3.7k

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In convex quadrilateral $ABCD,$ $\angle A \cong \angle C,$ $AB=CD=180,$ and $AD \ne BC.$ The perimeter of $ABCD$ is $640.$ Find $\cos A.$

Published on 28 Mar 2026 - 17:04

score 122 · Answer 7 · 2016-09-25 12:19:37

122

Views

Giving reasons , Find the following angles & show that $\triangle ODE$ is isosceles

Published on 25 Sep 2016 - 12:19

score 115 · Answer 8 · 2016-09-25 13:31:46

115

Views

In the following figure, prove that $AC$ bisects $GH$.

Published on 25 Sep 2016 - 13:31

score 622 · Answer 9 · 2016-09-26 14:14:52

622

Views

Prove the the orthocentre of a triangle which is incribed in a circle is inside of the concentric circle of 3 times radius.

Published on 26 Sep 2016 - 14:14

score 45 · Answer 10 · 2016-09-27 13:07:44

45

Views

Find the greatest leg of right triangle having a median only

Published on 27 Sep 2016 - 13:07

score 155 · Answer 11 · 2016-09-27 20:49:25

155

Views

Prove that three points are colinear.

Published on 27 Sep 2016 - 20:49

score 249 · Answer 12 · 2016-09-27 21:38:05

249

Views

Area of a triangle in a diagram

Published on 27 Sep 2016 - 21:38

score 675 · Answer 13 · 2016-09-28 07:46:32

675

Views

range of sum of cosines of angles of a triangle using vectors?

Published on 28 Sep 2016 - 7:46

score 184 · Answer 14 · 2016-09-28 14:59:30

184

Views

Area of triangle PST in terms of triangle PQR

Published on 28 Sep 2016 - 14:59

score 333 · Answer 15 · 2026-03-25 07:43:04

333

Views

Confusion over SSA axiom for congruency

Published on 25 Mar 2026 - 7:43

List Question

How to relate the perpendicular line that touches a circle and an inscribed triangle with its sides/area?

Proof that rectangle triangle is isosceles

Prove that :$[BCA']^2+[CAB']^2+[ABC']^2=[ABC]^2$, where [•] denote the area.

If $P$ is any point on a straight line drawn through the vertex $A$ of an isosceles triangle $ABC$, parallel to the base, prove that $PB+PC>AB+AC$

How to find the included angle between the given known sides

In convex quadrilateral $ABCD,$ $\angle A \cong \angle C,$ $AB=CD=180,$ and $AD \ne BC.$ The perimeter of $ABCD$ is $640.$ Find $\cos A.$

Giving reasons , Find the following angles & show that $\triangle ODE$ is isosceles

In the following figure, prove that $AC$ bisects $GH$.

Prove the the orthocentre of a triangle which is incribed in a circle is inside of the concentric circle of 3 times radius.

Find the greatest leg of right triangle having a median only

Prove that three points are colinear.

Area of a triangle in a diagram

range of sum of cosines of angles of a triangle using vectors?

Area of triangle PST in terms of triangle PQR

Confusion over SSA axiom for congruency

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