# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute isosceles triangle.

Sides: a = 16   b = 25   c = 25

Area: T = 189.4843508517
Perimeter: p = 66
Semiperimeter: s = 33

Angle ∠ A = α = 37.32658497699° = 37°19'33″ = 0.65114589746 rad
Angle ∠ B = β = 71.33770751151° = 71°20'13″ = 1.24550668395 rad
Angle ∠ C = γ = 71.33770751151° = 71°20'13″ = 1.24550668395 rad

Height: ha = 23.68554385647
Height: hb = 15.15986806814
Height: hc = 15.15986806814

Median: ma = 23.68554385647
Median: mb = 16.86597153001
Median: mc = 16.86597153001

Inradius: r = 5.74219245005
Circumradius: R = 13.19437603413

Vertex coordinates: A[25; 0] B[0; 0] C[5.12; 15.15986806814]
Centroid: CG[10.04; 5.05328935605]
Coordinates of the circumscribed circle: U[12.5; 4.22220033092]
Coordinates of the inscribed circle: I[8; 5.74219245005]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 142.674415023° = 142°40'27″ = 0.65114589746 rad
∠ B' = β' = 108.6632924885° = 108°39'47″ = 1.24550668395 rad
∠ C' = γ' = 108.6632924885° = 108°39'47″ = 1.24550668395 rad

# How did we calculate this triangle?

### 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.