# Triangle calculator SAS

Please enter two sides of the triangle and the included angle
°

### Right isosceles triangle.

Sides: a = 5.5   b = 5.5   c = 7.77881745931

Area: T = 15.125
Perimeter: p = 18.77881745931
Semiperimeter: s = 9.38990872965

Angle ∠ A = α = 45° = 0.78553981634 rad
Angle ∠ B = β = 45° = 0.78553981634 rad
Angle ∠ C = γ = 90° = 1.57107963268 rad

Height: ha = 5.5
Height: hb = 5.5
Height: hc = 3.88990872965

Median: ma = 6.14991869381
Median: mb = 6.14991869381
Median: mc = 3.88990872965

Inradius: r = 1.61109127035
Circumradius: R = 3.88990872965

Vertex coordinates: A[7.77881745931; 0] B[0; 0] C[3.88990872965; 3.88990872965]
Centroid: CG[3.88990872965; 1.29663624322]
Coordinates of the circumscribed circle: U[3.88990872965; 0]
Coordinates of the inscribed circle: I[3.88990872965; 1.61109127035]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 135° = 0.78553981634 rad
∠ B' = β' = 135° = 0.78553981634 rad
∠ C' = γ' = 90° = 1.57107963268 rad

# How did we calculate this triangle?

### 1. Calculation of the third side c of the triangle using a Law of Cosines

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.

### 9. Calculation of medians

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See more informations about triangles or more information about solving triangles.