# 9 25 29 triangle

### Obtuse scalene triangle.

Sides: a = 9   b = 25   c = 29

Area: T = 107.3188160159
Perimeter: p = 63
Semiperimeter: s = 31.5

Angle ∠ A = α = 17.22105164629° = 17°13'14″ = 0.30105547112 rad
Angle ∠ B = β = 55.32218804133° = 55°19'19″ = 0.96655489616 rad
Angle ∠ C = γ = 107.4587603124° = 107°27'27″ = 1.87554889808 rad

Height: ha = 23.84884800354
Height: hb = 8.58554528128
Height: hc = 7.40112524248

Median: ma = 26.69773781484
Median: mb = 17.45770902501
Median: mc = 11.94878031453

Inradius: r = 3.40769257193
Circumradius: R = 15.22001301325

Vertex coordinates: A[29; 0] B[0; 0] C[5.12106896552; 7.40112524248]
Centroid: CG[11.37435632184; 2.46770841416]
Coordinates of the circumscribed circle: U[14.5; -4.56600390397]
Coordinates of the inscribed circle: I[6.5; 3.40769257193]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 162.7799483537° = 162°46'46″ = 0.30105547112 rad
∠ B' = β' = 124.6788119587° = 124°40'41″ = 0.96655489616 rad
∠ C' = γ' = 72.54223968763° = 72°32'33″ = 1.87554889808 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.