# 1015 1035 1450 triangle

### Obtuse scalene triangle.

Sides: a = 1015   b = 1035   c = 1450

Area: T = 525262.4344408
Perimeter: p = 3500
Semiperimeter: s = 1750

Angle ∠ A = α = 44.42769969877° = 44°25'37″ = 0.77553973742 rad
Angle ∠ B = β = 45.54443694382° = 45°32'40″ = 0.79548992024 rad
Angle ∠ C = γ = 90.02986335742° = 90°1'43″ = 1.57112960769 rad

Height: ha = 10354.99987075
Height: hb = 10154.99987325
Height: hc = 724.5499909528

Median: ma = 1152.955544146
Median: mb = 1139.542212296
Median: mc = 724.638784058

Inradius: r = 300.1549962519
Circumradius: R = 7255.000090535

Vertex coordinates: A[1450; 0] B[0; 0] C[710.8622068966; 724.5499909528]
Centroid: CG[720.2877356322; 241.5499969843]
Coordinates of the circumscribed circle: U[725; -0.36223188858]
Coordinates of the inscribed circle: I[715; 300.1549962519]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 135.5733003012° = 135°34'23″ = 0.77553973742 rad
∠ B' = β' = 134.4565630562° = 134°27'20″ = 0.79548992024 rad
∠ C' = γ' = 89.97113664258° = 89°58'17″ = 1.57112960769 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   