# 4 24 25 triangle

### Obtuse scalene triangle.

Sides: a = 4   b = 24   c = 25

Area: T = 47.28657007984
Perimeter: p = 53
Semiperimeter: s = 26.5

Angle ∠ A = α = 9.0698721546° = 9°4'7″ = 0.15882790499 rad
Angle ∠ B = β = 71.03444250112° = 71°2'4″ = 1.24397845987 rad
Angle ∠ C = γ = 99.89768534428° = 99°53'49″ = 1.7443529005 rad

Height: ha = 23.64328503992
Height: hb = 3.94404750665
Height: hc = 3.78328560639

Median: ma = 24.42333494836
Median: mb = 13.28553302556
Median: mc = 11.82215904175

Inradius: r = 1.78443660679
Circumradius: R = 12.68988253715

Vertex coordinates: A[25; 0] B[0; 0] C[1.3; 3.78328560639]
Centroid: CG[8.76766666667; 1.26109520213]
Coordinates of the circumscribed circle: U[12.5; -2.18108918607]
Coordinates of the inscribed circle: I[2.5; 1.78443660679]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 170.9311278454° = 170°55'53″ = 0.15882790499 rad
∠ B' = β' = 108.9665574989° = 108°57'56″ = 1.24397845987 rad
∠ C' = γ' = 80.10331465572° = 80°6'11″ = 1.7443529005 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.