Triangle Calculator
Provide 3 values including at least one side. Click "Calculate". Radians accept pi/2, pi/4, etc.
Angle Unit:
side b
side a
A
side b
side a
B
side c
angle B
C
angle C
angle A
About Triangles
A triangle is a polygon with three vertices joined by three line segments. Triangles are described by side lengths (equilateral, isosceles, scalene) and by angles (acute, right, obtuse). Provide any 3 values (at least one side) to compute the rest.
Math Calculators
Triangle Results
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Sides
Side a =—
Side b =—
Side c =—
Angles
∠A =—
∠B =—
∠C =—
In radians =—
Measurements
Area =—
Perimeter =—
Semiperimeter =—
Heights
ha =—
hb =—
hc =—
Medians
ma =—
mb =—
mc =—
Radii
Inradius r =—
Circumradius R =—
Vertex Coordinates
A =—
B =—
C =—
Centers
Centroid =—
Incenter =—
Circumcenter =—