# 8 23 25 triangle

### Obtuse scalene triangle.

Sides: a = 8   b = 23   c = 25

Area: T = 91.65215138991
Perimeter: p = 56
Semiperimeter: s = 28

Angle ∠ A = α = 18.59896365026° = 18°35'23″ = 0.32444503637 rad
Angle ∠ B = β = 66.42218215218° = 66°25'19″ = 1.15992794807 rad
Angle ∠ C = γ = 94.98985419756° = 94°59'19″ = 1.65878628091 rad

Height: ha = 22.91328784748
Height: hb = 7.97696968608
Height: hc = 7.33221211119

Median: ma = 23.68554385647
Median: mb = 14.56988022843
Median: mc = 11.84327192823

Inradius: r = 3.27332683535
Circumradius: R = 12.54875286886

Vertex coordinates: A[25; 0] B[0; 0] C[3.2; 7.33221211119]
Centroid: CG[9.4; 2.44440403706]
Coordinates of the circumscribed circle: U[12.5; -1.09110894512]
Coordinates of the inscribed circle: I[5; 3.27332683535]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 161.4110363497° = 161°24'37″ = 0.32444503637 rad
∠ B' = β' = 113.5788178478° = 113°34'41″ = 1.15992794807 rad
∠ C' = γ' = 85.01114580244° = 85°41″ = 1.65878628091 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.