# Triangle calculator - result

Please enter what you know about the triangle:

You have entered side a, b and c.

### Obtuse scalene triangle.

Sides: a = 55   b = 36   c = 28

Area: T = 445.1998761791
Perimeter: p = 119
Semiperimeter: s = 59.5

Angle ∠ A = α = 117.9533186883° = 117°57'11″ = 2.05986714743 rad
Angle ∠ B = β = 35.32326498434° = 35°19'22″ = 0.61664965403 rad
Angle ∠ C = γ = 26.72441632732° = 26°43'27″ = 0.4666424639 rad

Height: ha = 16.18990458833
Height: hb = 24.73332645439
Height: hc = 31.87999115565

Median: ma = 16.84548805279
Median: mb = 39.75655027638
Median: mc = 44.32326804244

Inradius: r = 7.48223321309
Circumradius: R = 31.13221620578

Vertex coordinates: A[28; 0] B[0; 0] C[44.875; 31.87999115565]
Centroid: CG[24.29216666667; 10.65999705188]
Coordinates of the circumscribed circle: U[14; 27.80766811107]
Coordinates of the inscribed circle: I[23.5; 7.48223321309]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 62.04768131166° = 62°2'49″ = 2.05986714743 rad
∠ B' = β' = 144.6777350157° = 144°40'38″ = 0.61664965403 rad
∠ C' = γ' = 153.2765836727° = 153°16'33″ = 0.4666424639 rad

# How did we calculate this triangle?

### 1. Input data entered: side a, b and c.

Now we know the lengths of all three sides of the triangle and the triangle is uniquely determined. Next we calculate another its characteristics - same procedure as calculation of the triangle from the known three sides SSS.