# 8 26 28 triangle

### Obtuse scalene triangle.

Sides: a = 8   b = 26   c = 28

Area: T = 103.4176633092
Perimeter: p = 62
Semiperimeter: s = 31

Angle ∠ A = α = 16.50657537272° = 16°30'21″ = 0.28880797481 rad
Angle ∠ B = β = 67.42327592381° = 67°25'22″ = 1.17767491395 rad
Angle ∠ C = γ = 96.07114870347° = 96°4'17″ = 1.6776763766 rad

Height: ha = 25.85441582729
Height: hb = 7.95551256224
Height: hc = 7.38769023637

Median: ma = 26.72107784318
Median: mb = 15.96987194227
Median: mc = 13.19109059583

Inradius: r = 3.33660204223
Circumradius: R = 14.07989731446

Vertex coordinates: A[28; 0] B[0; 0] C[3.07114285714; 7.38769023637]
Centroid: CG[10.35771428571; 2.46223007879]
Coordinates of the circumscribed circle: U[14; -1.48991221595]
Coordinates of the inscribed circle: I[5; 3.33660204223]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 163.4944246273° = 163°29'39″ = 0.28880797481 rad
∠ B' = β' = 112.5777240762° = 112°34'38″ = 1.17767491395 rad
∠ C' = γ' = 83.92985129653° = 83°55'43″ = 1.6776763766 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.