Altitude of an equilateral triangle
\[h=\frac{a\sqrt3}{2}\]
NMT / ZNO
Formulas and reference
A compact mathematics reference in two levels: the NMT exam sheet and the full ZNO formula set.
ZNO — full reference
·
Geometry
·
4 formulas
Full ZNO
Expanded school formula set. The “NMT” badge marks formulas also present on the compact sheet.
Special triangles
Equilateral triangle
Area of an equilateral triangle
\[S=\frac{a^2\sqrt3}{4}\]
Circumradius of an equilateral triangle
\[R=\frac{a\sqrt3}{3}\]
Inradius of an equilateral triangle
\[r=\frac{a\sqrt3}{6}\]
No formulas match this search.