# 6960 5535 8895 triangle

### Obtuse scalene triangle.

Sides: a = 6960   b = 5535   c = 8895

Area: T = 19261796.97222
Perimeter: p = 21390
Semiperimeter: s = 10695

Angle ∠ A = α = 51.48765437762° = 51°29'12″ = 0.89986097094 rad
Angle ∠ B = β = 38.481133075° = 38°28'53″ = 0.67216259221 rad
Angle ∠ C = γ = 90.03221254738° = 90°1'56″ = 1.57113570221 rad

Height: ha = 5534.999912996
Height: hb = 6959.999890596
Height: hc = 4330.927680658

Median: ma = 6539.742196739
Median: mb = 7491.47989094
Median: mc = 4445.071100618

Inradius: r = 1801.010953457
Circumradius: R = 4447.50106991

Vertex coordinates: A[8895; 0] B[0; 0] C[5448.364424958; 4330.927680658]
Centroid: CG[4781.121141653; 1443.642226886]
Coordinates of the circumscribed circle: U[4447.5; -2.49436925703]
Coordinates of the inscribed circle: I[5160; 1801.010953457]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 128.5133456224° = 128°30'48″ = 0.89986097094 rad
∠ B' = β' = 141.519866925° = 141°31'7″ = 0.67216259221 rad
∠ C' = γ' = 89.96878745262° = 89°58'4″ = 1.57113570221 rad

# How did we calculate this triangle?

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. ### 1. The triangle circumference is the sum of the lengths of its three sides ### 2. Semiperimeter of the triangle ### 3. The triangle area using Heron's formula ### 4. Calculate the heights of the triangle from its area. ### 5. Calculation of the inner angles of the triangle using a Law of Cosines    