# 1.5 1.5 0.78 triangle

### Acute isosceles triangle.

Sides: a = 1.5   b = 1.5   c = 0.78

Area: T = 0.56548810406
Perimeter: p = 3.78
Semiperimeter: s = 1.89

Angle ∠ A = α = 74.93299378551° = 74°55'48″ = 1.30877741239 rad
Angle ∠ B = β = 74.93299378551° = 74°55'48″ = 1.30877741239 rad
Angle ∠ C = γ = 30.14401242898° = 30°8'24″ = 0.52660444058 rad

Height: ha = 0.75331747208
Height: hb = 0.75331747208
Height: hc = 1.44884129245

Median: ma = 0.9310967239
Median: mb = 0.9310967239
Median: mc = 1.44884129245

Inradius: r = 0.29988788574
Circumradius: R = 0.77767122075

Vertex coordinates: A[0.78; 0] B[0; 0] C[0.39; 1.44884129245]
Centroid: CG[0.39; 0.48328043082]
Coordinates of the circumscribed circle: U[0.39; 0.6721700717]
Coordinates of the inscribed circle: I[0.39; 0.29988788574]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 105.0770062145° = 105°4'12″ = 1.30877741239 rad
∠ B' = β' = 105.0770062145° = 105°4'12″ = 1.30877741239 rad
∠ C' = γ' = 149.865987571° = 149°51'36″ = 0.52660444058 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.