# 6 8 8 triangle

### Acute isosceles triangle.

Sides: a = 6   b = 8   c = 8

Area: T = 22.24985954613
Perimeter: p = 22
Semiperimeter: s = 11

Angle ∠ A = α = 44.04986256741° = 44°2'55″ = 0.7698793549 rad
Angle ∠ B = β = 67.9765687163° = 67°58'32″ = 1.18663995523 rad
Angle ∠ C = γ = 67.9765687163° = 67°58'32″ = 1.18663995523 rad

Height: ha = 7.41661984871
Height: hb = 5.56221488653
Height: hc = 5.56221488653

Median: ma = 7.41661984871
Median: mb = 5.83109518948
Median: mc = 5.83109518948

Inradius: r = 2.02325995874
Circumradius: R = 4.31548791198

Vertex coordinates: A[8; 0] B[0; 0] C[2.25; 5.56221488653]
Centroid: CG[3.41766666667; 1.85440496218]
Coordinates of the circumscribed circle: U[4; 1.61880796699]
Coordinates of the inscribed circle: I[3; 2.02325995874]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 135.9511374326° = 135°57'5″ = 0.7698793549 rad
∠ B' = β' = 112.0244312837° = 112°1'28″ = 1.18663995523 rad
∠ C' = γ' = 112.0244312837° = 112°1'28″ = 1.18663995523 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.