Reckoning / Shape / Isosceles triangle
Plane figure · Triangles
Isosceles triangle
Two equal sides; the height from the apex halves the base at right angles.
Dimensions
Results
height h
area A
Formulas
The height splits it into two right triangles with hypotenuse s and leg b/2.
Checked: the A formula agrees with a Monte Carlo measurement of the shape itself, made from its geometric definition, every time the site is built.
Topology lens
Topologically a disc, like every figure here without a hole: Euler characteristic 1. Stretching turns it into a circle, a square or a star. More on the lens.