# 7 29 30 triangle

### Obtuse scalene triangle.

Sides: a = 7   b = 29   c = 30

Area: T = 101.4699207152
Perimeter: p = 66
Semiperimeter: s = 33

Angle ∠ A = α = 13.48992278626° = 13°29'21″ = 0.23554314398 rad
Angle ∠ B = β = 75.09994033122° = 75°5'58″ = 1.31107318541 rad
Angle ∠ C = γ = 91.41113688253° = 91°24'41″ = 1.59554293598 rad

Height: ha = 28.99112020434
Height: hb = 6.99878763553
Height: hc = 6.76546138101

Median: ma = 29.29659041506
Median: mb = 16.2565768207
Median: mc = 14.83223969742

Inradius: r = 3.07548244591
Circumradius: R = 15.00545520482

Vertex coordinates: A[30; 0] B[0; 0] C[1.8; 6.76546138101]
Centroid: CG[10.6; 2.255487127]
Coordinates of the circumscribed circle: U[15; -0.37695702475]
Coordinates of the inscribed circle: I[4; 3.07548244591]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 166.5110772137° = 166°30'39″ = 0.23554314398 rad
∠ B' = β' = 104.9010596688° = 104°54'2″ = 1.31107318541 rad
∠ C' = γ' = 88.58986311747° = 88°35'19″ = 1.59554293598 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.