New posts in triangles

How many triangles with integral side lengths are possible, provided their perimeter is $36$ units?

combinatorics geometry triangles

How many isosceles, right-angled, INSCRIBED triangles exist in an ellipse?

geometry euclidean-geometry triangles

Triangles and Semicircles. [duplicate]

geometry triangles circles

Can you illustrate the text about angles?

triangles angle

How to derive the law of cosines without the pythagorean theorem

geometry trigonometry triangles

Given $\triangle ABC$ isosceles with base AB, M and N the midpoints of the equal sides. Show the reflection of C is the midpoint of AB

geometry proof-explanation euclidean-geometry triangles

In a 30-60 right triangle the side opposite the 30 degree angle is half the length of the hypotenuse. Why? [closed]

geometry trigonometry triangles

Tricky Triangle Area Problem

geometry contest-math triangles area

Shrinking a triangle keeping all angles the same (for practical application)

triangles

Number of ways to dissect a square into triangles of equal area

triangles combinatorial-geometry

Prove the diagonals of rhumbus are perpendicular and angles bisector

geometry solution-verification proof-explanation euclidean-geometry triangles

$PA^2\sin A+PB^2\sin B+PC^2\sin C$ is minimum if P is the incenter.

geometry trigonometry triangles

Triangles of the form $a^n+b^n=c^n$

geometry triangles

Find the angles of given triangle ABC

geometry euclidean-geometry triangles plane-geometry angle

Find the area of ​the triangular region KHQ,

geometry euclidean-geometry triangles alternative-proof plane-geometry

Angles of triangle $\triangle XYZ$ do not depend on the position of point $P$ (proof needed)

geometry euclidean-geometry triangles quadrilateral geometric-transformation

Dividing an obtuse triangle into acute triangles

geometry triangles puzzle

"Pseudovertices" of a triangle

geometry euclidean-geometry triangles

"World's Hardest Easy Geometry Problem"

geometry triangles angle

How to measure changing dimensions of right scalene triangle as hypotenuse rotates?

geometry triangles