# Triangle calculator SSS - result

Please enter the triangle sides:

### Acute isosceles triangle.

Sides: a = 4   b = 7   c = 7

Area: T = 13.4166407865
Perimeter: p = 18
Semiperimeter: s = 9

Angle ∠ A = α = 33.2033099198° = 33°12'11″ = 0.58795034029 rad
Angle ∠ B = β = 73.3988450401° = 73°23'54″ = 1.28110446254 rad
Angle ∠ C = γ = 73.3988450401° = 73°23'54″ = 1.28110446254 rad

Height: ha = 6.70882039325
Height: hb = 3.833325939
Height: hc = 3.833325939

Median: ma = 6.70882039325
Median: mb = 4.5
Median: mc = 4.5

Inradius: r = 1.4910711985
Circumradius: R = 3.65222443632

Vertex coordinates: A[7; 0] B[0; 0] C[1.14328571429; 3.833325939]
Centroid: CG[2.71442857143; 1.278775313]
Coordinates of the circumscribed circle: U[3.5; 1.04334983895]
Coordinates of the inscribed circle: I[2; 1.4910711985]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 146.7976900802° = 146°47'49″ = 0.58795034029 rad
∠ B' = β' = 106.6021549599° = 106°36'6″ = 1.28110446254 rad
∠ C' = γ' = 106.6021549599° = 106°36'6″ = 1.28110446254 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.