Illustration used to show how to draw an equilateral triangle when given the altitude.

Illustration to show altitudes drawn from base angles of an isosceles triangle.

Illustration to show altitudes in a triangle. It is known as the orthocenter.

Illustration used to show the various parts of a triangle: sides, angles, medians, altitudes, bisectors,…

Illustration of three isosceles triangles with the same base AC but varying heights (as B gets farther…

Illustration that shows two similar triangles with altitudes drawn.