# 2 27 28 triangle

### Obtuse scalene triangle.

Sides: a = 2   b = 27   c = 28

Area: T = 23.87999474789
Perimeter: p = 57
Semiperimeter: s = 28.5

Angle ∠ A = α = 3.61098918931° = 3°36'36″ = 0.06330044992 rad
Angle ∠ B = β = 58.21114653664° = 58°12'41″ = 1.01659817331 rad
Angle ∠ C = γ = 118.1798642741° = 118°10'43″ = 2.06326064214 rad

Height: ha = 23.87999474789
Height: hb = 1.76329590725
Height: hc = 1.76999962485

Median: ma = 27.48663602538
Median: mb = 14.55216322109
Median: mc = 13.05875648572

Inradius: r = 0.83550858765
Circumradius: R = 15.88223879899

Vertex coordinates: A[28; 0] B[0; 0] C[1.05435714286; 1.76999962485]
Centroid: CG[9.68545238095; 0.56766654162]
Coordinates of the circumscribed circle: U[14; -7.55000165508]
Coordinates of the inscribed circle: I[1.5; 0.83550858765]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 176.3990108107° = 176°23'24″ = 0.06330044992 rad
∠ B' = β' = 121.7898534634° = 121°47'19″ = 1.01659817331 rad
∠ C' = γ' = 61.82113572595° = 61°49'17″ = 2.06326064214 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 ### 6. Inradius ### 7. Circumradius ### 8. Calculation of medians #### Look also our friend's collection of math examples and problems:

See more informations about triangles or more information about solving triangles.