# 14 23 28 triangle

### Obtuse scalene triangle.

Sides: a = 14   b = 23   c = 28

Area: T = 160.3232916328
Perimeter: p = 65
Semiperimeter: s = 32.5

Angle ∠ A = α = 29.86109807915° = 29°51'40″ = 0.52111724327 rad
Angle ∠ B = β = 54.88325008958° = 54°52'57″ = 0.95878803424 rad
Angle ∠ C = γ = 95.25765183127° = 95°15'23″ = 1.66325398785 rad

Height: ha = 22.90332737612
Height: hb = 13.9411123159
Height: hc = 11.45216368806

Median: ma = 24.64875150877
Median: mb = 18.91442803194
Median: mc = 12.90334879006

Inradius: r = 4.93330128101
Circumradius: R = 14.05991254926

Vertex coordinates: A[28; 0] B[0; 0] C[8.05435714286; 11.45216368806]
Centroid: CG[12.01878571429; 3.81772122935]
Coordinates of the circumscribed circle: U[14; -1.28880254721]
Coordinates of the inscribed circle: I[9.5; 4.93330128101]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 150.1399019208° = 150°8'20″ = 0.52111724327 rad
∠ B' = β' = 125.1177499104° = 125°7'3″ = 0.95878803424 rad
∠ C' = γ' = 84.74334816873° = 84°44'37″ = 1.66325398785 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.