# 8 9 14 triangle

### Obtuse scalene triangle.

Sides: a = 8   b = 9   c = 14

Area: T = 33.66765635312
Perimeter: p = 31
Semiperimeter: s = 15.5

Angle ∠ A = α = 32.30325452092° = 32°18'9″ = 0.56437857707 rad
Angle ∠ B = β = 36.95550748363° = 36°57'18″ = 0.64549877312 rad
Angle ∠ C = γ = 110.7422379954° = 110°44'33″ = 1.93328191517 rad

Height: ha = 8.41766408828
Height: hb = 7.48114585625
Height: hc = 4.81095090759

Median: ma = 11.06879718106
Median: mb = 10.47661634199
Median: mc = 4.84876798574

Inradius: r = 2.17220363569
Circumradius: R = 7.48551714451

Vertex coordinates: A[14; 0] B[0; 0] C[6.39328571429; 4.81095090759]
Centroid: CG[6.79876190476; 1.6033169692]
Coordinates of the circumscribed circle: U[7; -2.65109982202]
Coordinates of the inscribed circle: I[6.5; 2.17220363569]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 147.6977454791° = 147°41'51″ = 0.56437857707 rad
∠ B' = β' = 143.0454925164° = 143°2'42″ = 0.64549877312 rad
∠ C' = γ' = 69.25876200455° = 69°15'27″ = 1.93328191517 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.