# 14 17 25 triangle

### Obtuse scalene triangle.

Sides: a = 14   b = 17   c = 25

Area: T = 113.7376537665
Perimeter: p = 56
Semiperimeter: s = 28

Angle ∠ A = α = 32.3659562712° = 32°21'34″ = 0.56547809138 rad
Angle ∠ B = β = 40.53658021113° = 40°32'9″ = 0.70774832118 rad
Angle ∠ C = γ = 107.1054635177° = 107°6'17″ = 1.8699328528 rad

Height: ha = 16.24880768093
Height: hb = 13.3810769137
Height: hc = 9.09989230132

Median: ma = 20.19990098767
Median: mb = 18.39215741577
Median: mc = 9.28770878105

Inradius: r = 4.06220192023
Circumradius: R = 13.07884709166

Vertex coordinates: A[25; 0] B[0; 0] C[10.64; 9.09989230132]
Centroid: CG[11.88; 3.03329743377]
Coordinates of the circumscribed circle: U[12.5; -3.84766090931]
Coordinates of the inscribed circle: I[11; 4.06220192023]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 147.6440437288° = 147°38'26″ = 0.56547809138 rad
∠ B' = β' = 139.4644197889° = 139°27'51″ = 0.70774832118 rad
∠ C' = γ' = 72.89553648234° = 72°53'43″ = 1.8699328528 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.