Triangle calculator SSA

Please enter two sides and a non-included angle
°


Triangle has two solutions with side c=18.59765254097 and with side c=6.677651603

#1 Obtuse scalene triangle.

Sides: a = 12.9   b = 6.5   c = 18.59765254097

Area: T = 24.11988118209
Perimeter: p = 37.99765254097
Semiperimeter: s = 18.99882627048

Angle ∠ A = α = 23.52195736403° = 23°31'10″ = 0.41104939987 rad
Angle ∠ B = β = 11.6° = 11°36' = 0.20224581932 rad
Angle ∠ C = γ = 144.888042636° = 144°52'50″ = 2.52986404617 rad

Height: ha = 3.73993506699
Height: hb = 7.4211172868
Height: hc = 2.59439051828

Median: ma = 12.34765735593
Median: mb = 15.67702864893
Median: mc = 4.22875655728

Inradius: r = 1.27695272297
Circumradius: R = 16.1632888404

Vertex coordinates: A[18.59765254097; 0] B[0; 0] C[12.63765207198; 2.59439051828]
Centroid: CG[10.41110153765; 0.86546350609]
Coordinates of the circumscribed circle: U[9.29882627048; -13.2220486838]
Coordinates of the inscribed circle: I[12.49882627048; 1.27695272297]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 156.488042636° = 156°28'50″ = 0.41104939987 rad
∠ B' = β' = 168.4° = 168°24' = 0.20224581932 rad
∠ C' = γ' = 35.12195736403° = 35°7'10″ = 2.52986404617 rad




How did we calculate this triangle?

1. Use Law of Cosines


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