# 13 25 29 triangle

### Obtuse scalene triangle.

Sides: a = 13   b = 25   c = 29

Area: T = 162.0754635585
Perimeter: p = 67
Semiperimeter: s = 33.5

Angle ∠ A = α = 26.55879311211° = 26°33'29″ = 0.46435233406 rad
Angle ∠ B = β = 59.2965524616° = 59°17'44″ = 1.03549021362 rad
Angle ∠ C = γ = 94.1476544263° = 94°8'48″ = 1.64331671768 rad

Height: ha = 24.93545593208
Height: hb = 12.96659708468
Height: hc = 11.17875610748

Median: ma = 26.28221232019
Median: mb = 18.6754849397
Median: mc = 13.66656503687

Inradius: r = 4.83880488234
Circumradius: R = 14.53880552083

Vertex coordinates: A[29; 0] B[0; 0] C[6.63879310345; 11.17875610748]
Centroid: CG[11.87993103448; 3.72658536916]
Coordinates of the circumscribed circle: U[14.5; -1.05112132228]
Coordinates of the inscribed circle: I[8.5; 4.83880488234]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 153.4422068879° = 153°26'31″ = 0.46435233406 rad
∠ B' = β' = 120.7044475384° = 120°42'16″ = 1.03549021362 rad
∠ C' = γ' = 85.8533455737° = 85°51'12″ = 1.64331671768 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.