Triangle calculator VC
Obtuse scalene triangle.
Sides: a = 72.79880803318 b = 56.77001807757 c = 17.76438959691Area: T = 240.86435
Perimeter: p = 147.2622157077
Semiperimeter: s = 73.63110785383
Angle ∠ A = α = 151.4277153742° = 151°25'38″ = 2.64329024097 rad
Angle ∠ B = β = 21.87107587166° = 21°52'15″ = 0.38217167495 rad
Angle ∠ C = γ = 6.70220875413° = 6°42'8″ = 0.11769734944 rad
Height: ha = 6.6177303613
Height: hb = 8.49660399316
Height: hc = 27.11883191367
Median: ma = 20.98443542908
Median: mb = 44.7644166752
Median: mc = 64.64401307239
Inradius: r = 3.27112205876
Circumradius: R = 76.1054722681
Vertex coordinates: A[204.92; 962] B[212.34; 945.86] C[208.76; 1018.57]
Centroid: CG[208.6733333333; 975.4776666667]
Coordinates of the circumscribed circle: U[0; 0]
Coordinates of the inscribed circle: I[8.14994324396; 3.27112205876]
Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 28.57328462579° = 28°34'22″ = 2.64329024097 rad
∠ B' = β' = 158.1299241283° = 158°7'45″ = 0.38217167495 rad
∠ C' = γ' = 173.2987912459° = 173°17'52″ = 0.11769734944 rad
Calculate another triangle
How did we calculate this triangle?
1. We compute side a from coordinates using the Pythagorean theorem

2. We compute side b from coordinates using the Pythagorean theorem

3. We compute side c from coordinates using the Pythagorean theorem

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.

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

5. Semiperimeter of the triangle

6. The triangle area using Heron's formula

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

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

9. Inradius

10. Circumradius
