# 6 25 30 triangle

### Obtuse scalene triangle.

Sides: a = 6   b = 25   c = 30

Area: T = 45.33114184645
Perimeter: p = 61
Semiperimeter: s = 30.5

Angle ∠ A = α = 6.94331109138° = 6°56'35″ = 0.12111801458 rad
Angle ∠ B = β = 30.2443927956° = 30°14'38″ = 0.52878561216 rad
Angle ∠ C = γ = 142.813296113° = 142°48'47″ = 2.49325563862 rad

Height: ha = 15.11104728215
Height: hb = 3.62765134772
Height: hc = 3.02220945643

Median: ma = 27.45499544626
Median: mb = 17.6566443583
Median: mc = 10.27113192921

Inradius: r = 1.48662760152
Circumradius: R = 24.81772247441

Vertex coordinates: A[30; 0] B[0; 0] C[5.18333333333; 3.02220945643]
Centroid: CG[11.72877777778; 1.00773648548]
Coordinates of the circumscribed circle: U[15; -19.77110557128]
Coordinates of the inscribed circle: I[5.5; 1.48662760152]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 173.0576889086° = 173°3'25″ = 0.12111801458 rad
∠ B' = β' = 149.7566072044° = 149°45'22″ = 0.52878561216 rad
∠ C' = γ' = 37.18770388698° = 37°11'13″ = 2.49325563862 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.