# Triangle calculator

*You have entered side a, b and c.*

### Obtuse scalene triangle.

**Sides:**a = 3.6 b = 2.7 c = 1.8

**Area:**T = 2.35328373828

**Perimeter:**p = 8.1

**Semiperimeter:**s = 4.05

**Angle**∠ A = α = 104.4787512186° = 104°28'39″ = 1.82334765819 rad

**Angle**∠ B = β = 46.56774634422° = 46°34'3″ = 0.81327555614 rad

**Angle**∠ C = γ = 28.95550243719° = 28°57'18″ = 0.50553605103 rad

**Height:**h

_{a}= 1.30771318793

**Height:**h

_{b}= 1.74328425058

**Height:**h

_{c}= 2.61442637587

**Median:**m

_{a}= 1.42330249471

**Median:**m

_{b}= 2.50554939633

**Median:**m

_{c}= 3.05220484924

**Inradius:**r = 0.58109475019

**Circumradius:**R = 1.85990320062

**Vertex coordinates:**A[1.8; 0] B[0; 0] C[2.475; 2.61442637587]

**Centroid:**CG[1.425; 0.87114212529]

**Coordinates of the circumscribed circle:**U[0.9; 1.62766530054]

**Coordinates of the inscribed circle:**I[1.35; 0.58109475019]

**Exterior(or external, outer) angles of the triangle:**

∠ A' = α' = 75.52224878141° = 75°31'21″ = 1.82334765819 rad

∠ B' = β' = 133.4332536558° = 133°25'57″ = 0.81327555614 rad

∠ C' = γ' = 151.0454975628° = 151°2'42″ = 0.50553605103 rad

Calculate another triangle

# How did we calculate this triangle?

### 1. Input data entered: side a, b and c.

### 2. The triangle circumference is the sum of the lengths of its three sides

### 3. Semiperimeter of the triangle

### 4. The triangle area using Heron's formula

### 5. Calculate the heights of the triangle from its area.

### 6. Calculation of the inner angles of the triangle using a Law of Cosines

### 7. Inradius

### 8. Circumradius

### 9. Calculation of medians

Calculate another triangle