# 3 29 30 triangle

### Obtuse scalene triangle.

Sides: a = 3   b = 29   c = 30

Area: T = 41.6655333312
Perimeter: p = 62
Semiperimeter: s = 31

Angle ∠ A = α = 5.49663519766° = 5°29'47″ = 0.09659294388 rad
Angle ∠ B = β = 67.80438991432° = 67°48'14″ = 1.18334012857 rad
Angle ∠ C = γ = 106.769974888° = 106°41'59″ = 1.8622261929 rad

Height: ha = 27.77768888747
Height: hb = 2.87334712629
Height: hc = 2.77876888875

Median: ma = 29.46660821963
Median: mb = 15.62884996081
Median: mc = 14.14221356237

Inradius: r = 1.34440430101
Circumradius: R = 15.66105011441

Vertex coordinates: A[30; 0] B[0; 0] C[1.13333333333; 2.77876888875]
Centroid: CG[10.37877777778; 0.92658962958]
Coordinates of the circumscribed circle: U[15; -4.55001440069]
Coordinates of the inscribed circle: I[2; 1.34440430101]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 174.5043648023° = 174°30'13″ = 0.09659294388 rad
∠ B' = β' = 112.1966100857° = 112°11'46″ = 1.18334012857 rad
∠ C' = γ' = 73.33002511197° = 73°18'1″ = 1.8622261929 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.