Sector, chord, arc length calculator

Choose two parameters you know
Radius and center angleRadius and chord AB
Radius and EDRadius and apicocenter distance OE
Radius and chord AB
Chord AB and arch height EDChord AB & Aspect OE
Arch height ED & edge distance OEChord AB & Arc AB












Number of effective digits>>>

AO and OB are called radius

AC, BC and AB are called chords

Angle ACB is the circular angle

Angle AOB is the center image of the circle

The curved part AB is arc.

OE is the apicocenter distance

Triangle AOB is the triangle area

ED is arch height

The arc length is calculated as: (Central Angle / 180°) •π • r

The yellow area is fan-shaped

The formula for the area of ​​a sector is: (Angle AOB / 360°) •π • r²

The green area is the arch height area

The size of this area = sector area - AOB triangle