Triangle calculator
Acute scalene triangle.
Sides: a = 69 b = 70 c = 41Area: T = 1360.956554667
Perimeter: p = 180
Semiperimeter: s = 90
Angle ∠ A = α = 71.51439853209° = 71°30'50″ = 1.24881545051 rad
Angle ∠ B = β = 74.18548619223° = 74°11'5″ = 1.29547700957 rad
Angle ∠ C = γ = 34.30111527568° = 34°18'4″ = 0.59986680528 rad
Height: ha = 39.44879868599
Height: hb = 38.88444441904
Height: hc = 66.38880754471
Median: ma = 45.8288484592
Median: mb = 44.67766158074
Median: mc = 66.4109713145
Inradius: r = 15.12217282963
Circumradius: R = 36.37770147536
Vertex coordinates: A[41; 0] B[0; 0] C[18.80548780488; 66.38880754471]
Centroid: CG[19.93549593496; 22.12993584824]
Coordinates of the circumscribed circle: U[20.5; 30.05105774051]
Coordinates of the inscribed circle: I[20; 15.12217282963]
Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 108.4866014679° = 108°29'10″ = 1.24881545051 rad
∠ B' = β' = 105.8155138078° = 105°48'55″ = 1.29547700957 rad
∠ C' = γ' = 145.6998847243° = 145°41'56″ = 0.59986680528 rad
Calculate another triangle
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.

2. The triangle circumference is the sum of the lengths of its three sides

3. Semiperimeter of the triangle

4. The triangle area using Heron's formula

5. Calculate the heights of the triangle from its area.

6. Calculation of the inner angles of the triangle using a Law of Cosines

7. Inradius

8. Circumradius
