Newbetuts

Let $E$ be the center of side $CD$ of square $ABCD$. If the altitude in point $D$ on diagonal $BD$ intersects $AE$ in point $F$, prove that $B,C,F$..

Tiling the plane with consecutive squares

Find the area of region triangular BPM

Find the radius of circle, given tangents from three vertices of a square

$a^x+b^x=c^x$ in geometry

Two individuals are walking around a cylindrical tower. What is the probability that they can see each other?

Proving a condition of perpendicularity [closed]

How do you derive that the inradius in a right triangle is $r=\frac{a+b-c}2$?

How to find the ratio of area in increasing order for the given figure?

$\triangle ABC$ with a point $D$ inside has $\angle BAD=114^\circ$, $\angle DAC=6^\circ$, $\angle ACD=12^\circ$, and $\angle DCB=18^\circ$.

Find the area of the CEN triangular region

How many squares with vertices on $x^2y^2 =1$ are possible?

Find the area of the quadrangular region $ABNH $

Cross-ratio of Conics on a pencil of conics

New posts in plane-geometry

Find the area of region ABC below

What's the connection the ratio of the arithmetic progression to the area of the triangle below?

Does $\mathbb{R}^2$ Contain Uncountably Many Disjoint Copies of the Warsaw Circle?

Calculate the area of intersection between the circles below as a function of A1 and A2.

Find angle UFO in the picture attached

Trisect a quadrilateral into a $9$-grid; the middle has $1/9$ the area

Let $E$ be the center of side $CD$ of square $ABCD$. If the altitude in point $D$ on diagonal $BD$ intersects $AE$ in point $F$, prove that $B,C,F$..

Tiling the plane with consecutive squares

Find the area of region triangular BPM

Find the radius of circle, given tangents from three vertices of a square

$a^x+b^x=c^x$ in geometry

Two individuals are walking around a cylindrical tower. What is the probability that they can see each other?

Proving a condition of perpendicularity [closed]

How do you derive that the inradius in a right triangle is $r=\frac{a+b-c}2$?

How to find the ratio of area in increasing order for the given figure?

$\triangle ABC$ with a point $D$ inside has $\angle BAD=114^\circ$, $\angle DAC=6^\circ$, $\angle ACD=12^\circ$, and $\angle DCB=18^\circ$.

Find the area of the CEN triangular region

How many squares with vertices on $x^2y^2 =1$ are possible?

Find the area of the quadrangular region $ABNH $

Cross-ratio of Conics on a pencil of conics