Similar to 頂垂線_(三角形)

Altitude (triangle)

Circumgon

Partition of unity

Annals of Mathematics

Axiom (computer algebra system)

Brilliant (website)

Catalogue of Triangle Cubics

Encyclopedia of Triangle Centers

Theorema Egregium

Apollonius point

Wind triangle

Triangle center

Median (geometry)

De Longchamps point

Brocard circle

Gradient boosting

Orbital hybridisation

Many-valued logic