# Triangle calculator SSS - result

Please enter the triangle sides:

### Obtuse isosceles triangle.

Sides: a = 170   b = 170   c = 295

Area: T = 12466.80443595
Perimeter: p = 635
Semiperimeter: s = 317.5

Angle ∠ A = α = 29.81436467865° = 29°48'49″ = 0.52203462985 rad
Angle ∠ B = β = 29.81436467865° = 29°48'49″ = 0.52203462985 rad
Angle ∠ C = γ = 120.3732706427° = 120°22'22″ = 2.10109000567 rad

Height: ha = 146.6688286582
Height: hb = 146.6688286582
Height: hc = 84.52107075219

Median: ma = 225.2549861265
Median: mb = 225.2549861265
Median: mc = 84.52107075219

Inradius: r = 39.26655255417
Circumradius: R = 170.9644020814

Vertex coordinates: A[295; 0] B[0; 0] C[147.5; 84.52107075219]
Centroid: CG[147.5; 28.1743569174]
Coordinates of the circumscribed circle: U[147.5; -86.44333132923]
Coordinates of the inscribed circle: I[147.5; 39.26655255417]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 150.1866353214° = 150°11'11″ = 0.52203462985 rad
∠ B' = β' = 150.1866353214° = 150°11'11″ = 0.52203462985 rad
∠ C' = γ' = 59.6277293573° = 59°37'38″ = 2.10109000567 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   