# 5 26 30 triangle

### Obtuse scalene triangle.

Sides: a = 5   b = 26   c = 30

Area: T = 41.83222543022
Perimeter: p = 61
Semiperimeter: s = 30.5

Angle ∠ A = α = 6.15875167571° = 6°9'27″ = 0.10774689412 rad
Angle ∠ B = β = 33.90112619969° = 33°54'5″ = 0.59216886424 rad
Angle ∠ C = γ = 139.9411221246° = 139°56'28″ = 2.442243507 rad

Height: ha = 16.73329017209
Height: hb = 3.21878657156
Height: hc = 2.78988169535

Median: ma = 27.965979256
Median: mb = 17.1321841699
Median: mc = 11.20326782512

Inradius: r = 1.37215493214
Circumradius: R = 23.30773740888

Vertex coordinates: A[30; 0] B[0; 0] C[4.15; 2.78988169535]
Centroid: CG[11.38333333333; 0.93296056512]
Coordinates of the circumscribed circle: U[15; -17.83991055526]
Coordinates of the inscribed circle: I[4.5; 1.37215493214]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 173.8422483243° = 173°50'33″ = 0.10774689412 rad
∠ B' = β' = 146.0998738003° = 146°5'55″ = 0.59216886424 rad
∠ C' = γ' = 40.05987787539° = 40°3'32″ = 2.442243507 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.