4 27 30 triangle
Obtuse scalene triangle.
Sides: a = 4 b = 27 c = 30Area: T = 37.60990082294
Perimeter: p = 61
Semiperimeter: s = 30.5
Angle ∠ A = α = 5.32882629454° = 5°19'42″ = 0.09329957318 rad
Angle ∠ B = β = 38.81656606129° = 38°48'56″ = 0.6777461079 rad
Angle ∠ C = γ = 135.8566076442° = 135°51'22″ = 2.37111358427 rad
Height: ha = 18.80545041147
Height: hb = 2.78658524614
Height: hc = 2.50772672153
Median: ma = 28.4699281691
Median: mb = 16.60657219054
Median: mc = 12.14549578015
Inradius: r = 1.2333082237
Circumradius: R = 21.53773932505
Vertex coordinates: A[30; 0] B[0; 0] C[3.11766666667; 2.50772672153]
Centroid: CG[11.03988888889; 0.83657557384]
Coordinates of the circumscribed circle: U[15; -15.45550738603]
Coordinates of the inscribed circle: I[3.5; 1.2333082237]
Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 174.6721737055° = 174°40'18″ = 0.09329957318 rad
∠ B' = β' = 141.1844339387° = 141°11'4″ = 0.6777461079 rad
∠ C' = γ' = 44.14439235583° = 44°8'38″ = 2.37111358427 rad
Calculate another triangle
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

6. Inradius

7. Circumradius
