# 6 25 28 triangle

### Obtuse scalene triangle.

Sides: a = 6   b = 25   c = 28

Area: T = 68.40664141729
Perimeter: p = 59
Semiperimeter: s = 29.5

Angle ∠ A = α = 11.27108312847° = 11°16'15″ = 0.19767131154 rad
Angle ∠ B = β = 54.52443339139° = 54°31'28″ = 0.95216291493 rad
Angle ∠ C = γ = 114.2054834801° = 114°12'17″ = 1.9933250389 rad

Height: ha = 22.80221380576
Height: hb = 5.47325131338
Height: hc = 4.88661724409

Median: ma = 26.37223339885
Median: mb = 15.93295323221
Median: mc = 11.59774135047

Inradius: r = 2.31988614974
Circumradius: R = 15.34994378078

Vertex coordinates: A[28; 0] B[0; 0] C[3.48221428571; 4.88661724409]
Centroid: CG[10.4944047619; 1.6298724147]
Coordinates of the circumscribed circle: U[14; -6.29332695012]
Coordinates of the inscribed circle: I[4.5; 2.31988614974]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 168.7299168715° = 168°43'45″ = 0.19767131154 rad
∠ B' = β' = 125.4765666086° = 125°28'32″ = 0.95216291493 rad
∠ C' = γ' = 65.79551651985° = 65°47'43″ = 1.9933250389 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.