# 16 19 26 triangle

### Obtuse scalene triangle.

Sides: a = 16   b = 19   c = 26

Area: T = 151.2832641106
Perimeter: p = 61
Semiperimeter: s = 30.5

Angle ∠ A = α = 37.76990637407° = 37°46'9″ = 0.65991945177 rad
Angle ∠ B = β = 46.66222207563° = 46°39'44″ = 0.81444093885 rad
Angle ∠ C = γ = 95.56987155029° = 95°34'7″ = 1.66879887474 rad

Height: ha = 18.91103301382
Height: hb = 15.92444885375
Height: hc = 11.63771262389

Median: ma = 21.31990056053
Median: mb = 19.3844271975
Median: mc = 11.8111011811

Inradius: r = 4.96600865936
Circumradius: R = 13.062164399

Vertex coordinates: A[26; 0] B[0; 0] C[10.98107692308; 11.63771262389]
Centroid: CG[12.32769230769; 3.87990420796]
Coordinates of the circumscribed circle: U[13; -1.26774950582]
Coordinates of the inscribed circle: I[11.5; 4.96600865936]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 142.2310936259° = 142°13'51″ = 0.65991945177 rad
∠ B' = β' = 133.3387779244° = 133°20'16″ = 0.81444093885 rad
∠ C' = γ' = 84.43112844971° = 84°25'53″ = 1.66879887474 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.