# 8 23 30 triangle

### Obtuse scalene triangle.

Sides: a = 8   b = 23   c = 30

Area: T = 50.72990597193
Perimeter: p = 61
Semiperimeter: s = 30.5

Angle ∠ A = α = 8.45554725801° = 8°27'20″ = 0.14875758363 rad
Angle ∠ B = β = 25.00878332347° = 25°28″ = 0.43664690287 rad
Angle ∠ C = γ = 146.5376694185° = 146°32'12″ = 2.55875477885 rad

Height: ha = 12.68222649298
Height: hb = 4.41112225843
Height: hc = 3.38219373146

Median: ma = 26.42991505728
Median: mb = 18.70216042093
Median: mc = 8.45657672626

Inradius: r = 1.66332478596
Circumradius: R = 27.20333427711

Vertex coordinates: A[30; 0] B[0; 0] C[7.25; 3.38219373146]
Centroid: CG[12.41766666667; 1.12773124382]
Coordinates of the circumscribed circle: U[15; -22.69440930183]
Coordinates of the inscribed circle: I[7.5; 1.66332478596]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 171.545452742° = 171°32'40″ = 0.14875758363 rad
∠ B' = β' = 154.9922166765° = 154°59'32″ = 0.43664690287 rad
∠ C' = γ' = 33.46333058148° = 33°27'48″ = 2.55875477885 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.