# 7 19 25 triangle

### Obtuse scalene triangle.

Sides: a = 7   b = 19   c = 25

Area: T = 39.1565938247
Perimeter: p = 51
Semiperimeter: s = 25.5

Angle ∠ A = α = 9.49895146153° = 9°29'22″ = 0.16656232745 rad
Angle ∠ B = β = 26.58331710556° = 26°34'59″ = 0.46439638605 rad
Angle ∠ C = γ = 143.9277314329° = 143°55'38″ = 2.51220055186 rad

Height: ha = 11.18774109277
Height: hb = 4.12216777102
Height: hc = 3.13224750598

Median: ma = 21.92660119493
Median: mb = 15.70882780724
Median: mc = 6.98221200219

Inradius: r = 1.53655269901
Circumradius: R = 21.22992193015

Vertex coordinates: A[25; 0] B[0; 0] C[6.26; 3.13224750598]
Centroid: CG[10.42; 1.04441583533]
Coordinates of the circumscribed circle: U[12.5; -17.15989554504]
Coordinates of the inscribed circle: I[6.5; 1.53655269901]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 170.5110485385° = 170°30'38″ = 0.16656232745 rad
∠ B' = β' = 153.4176828944° = 153°25'1″ = 0.46439638605 rad
∠ C' = γ' = 36.07326856709° = 36°4'22″ = 2.51220055186 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.