Sector, chord, arc length calculator

Choose two parameters you know
Radius and center angle    Radius and chord AB
Radius and ridge ED    Radius and apicocenter distance OE
Radius and chord AB
Chord AB and arc ED    Chord AB & Aperture OE
Aperture ED & Aperture OE    Chord AB & Arc AB



Number of effective digits >>>

AO and OB are called radii

AC, BC and AB are called chords

Angle ACB is the circular angle

Angle AOB is the center image

The curved part of AB is the arc.

OE is the apicocenter distance

Triangle AOB is the triangular area

ED is the arch height

The arc length calculation formula is: (Central Angle / 180°) •π • r

The yellow area is the sector

The sector area formula is: (Angle AOB / 360°) •π • r²

The green area is the arch height area

This area size = sector area - AOB triangle