# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute isosceles triangle.

Sides: a = 20   b = 20   c = 23

Area: T = 188.1755283977
Perimeter: p = 63
Semiperimeter: s = 31.5

Angle ∠ A = α = 54.99003678046° = 54°54'1″ = 0.95881921787 rad
Angle ∠ B = β = 54.99003678046° = 54°54'1″ = 0.95881921787 rad
Angle ∠ C = γ = 70.19992643908° = 70°11'57″ = 1.22552082961 rad

Height: ha = 18.81875283977
Height: hb = 18.81875283977
Height: hc = 16.3633068172

Median: ma = 19.0921883092
Median: mb = 19.0921883092
Median: mc = 16.3633068172

Inradius: r = 5.9743818539
Circumradius: R = 12.2232646627

Vertex coordinates: A[23; 0] B[0; 0] C[11.5; 16.3633068172]
Centroid: CG[11.5; 5.45443560573]
Coordinates of the circumscribed circle: U[11.5; 4.14404215449]
Coordinates of the inscribed circle: I[11.5; 5.9743818539]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 125.1099632195° = 125°5'59″ = 0.95881921787 rad
∠ B' = β' = 125.1099632195° = 125°5'59″ = 0.95881921787 rad
∠ C' = γ' = 109.8010735609° = 109°48'3″ = 1.22552082961 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.