Newbetuts

Explain " If two straight lines a, b of a plane do not meet a third straight line c of the same plane, then they do not meet each other."

Show that $AM^2=p(p-a)$

Bisector proof in an olympiad level problem

What's the measure of the sid $BC$ in the quadrilateral below?

Could Euclid have proven that real number multiplication is commutative?

What is a the intuition behind a parametric equation?

Prove that $BC$, $B_1C_1$, $B_2C_2$ are concurrent.

Square inscribed in a right triangle problem

Conjecture about a point inside an equilateral triangle divided by integer angles

Sufficient condition to inscribe a polygon inside another one

There is a no set which every line meets the ball

Six points lie on a circle

A Golden Ratio Symphony! Why so many golden ratios in a relatively simple golden ratio construction with square and circle?

What happens when two infinite lines stop intersecting and become parallel?

Calculate angle $x$ in the figure

New posts in euclidean-geometry

Intersection of $n+k$ subspaces of $\mathbb{R}^n$

Problem about angle in isosceles triangle [closed]

Locus using Euclidean geometry

How many mutually orthogonal circles are possible?

Tiling the unit square with right triangles

Explain " If two straight lines a, b of a plane do not meet a third straight line c of the same plane, then they do not meet each other."

Show that $AM^2=p(p-a)$

Bisector proof in an olympiad level problem

What's the measure of the sid $BC$ in the quadrilateral below?

Could Euclid have proven that real number multiplication is commutative?

What is a the intuition behind a parametric equation?

Prove that $BC$, $B_1C_1$, $B_2C_2$ are concurrent.

Square inscribed in a right triangle problem

Conjecture about a point inside an equilateral triangle divided by integer angles

Sufficient condition to inscribe a polygon inside another one

There is a no set which every line meets the ball

Six points lie on a circle

A Golden Ratio Symphony! Why so many golden ratios in a relatively simple golden ratio construction with square and circle?

What happens when two infinite lines stop intersecting and become parallel?

Calculate angle $x$ in the figure