# 22 25 25 triangle

### Acute isosceles triangle.

Sides: a = 22   b = 25   c = 25

Area: T = 246.9499387527
Perimeter: p = 72
Semiperimeter: s = 36

Angle ∠ A = α = 52.20877622747° = 52°12'28″ = 0.91111973468 rad
Angle ∠ B = β = 63.89661188627° = 63°53'46″ = 1.11551976534 rad
Angle ∠ C = γ = 63.89661188627° = 63°53'46″ = 1.11551976534 rad

Height: ha = 22.45499443206
Height: hb = 19.75659510022
Height: hc = 19.75659510022

Median: ma = 22.45499443206
Median: mb = 19.95662020435
Median: mc = 19.95662020435

Inradius: r = 6.86597052091
Circumradius: R = 13.92198563496

Vertex coordinates: A[25; 0] B[0; 0] C[9.68; 19.75659510022]
Centroid: CG[11.56; 6.58553170007]
Coordinates of the circumscribed circle: U[12.5; 6.12547367938]
Coordinates of the inscribed circle: I[11; 6.86597052091]

Exterior(or external, outer) angles of the triangle:
∠ A' = α' = 127.7922237725° = 127°47'32″ = 0.91111973468 rad
∠ B' = β' = 116.1043881137° = 116°6'14″ = 1.11551976534 rad
∠ C' = γ' = 116.1043881137° = 116°6'14″ = 1.11551976534 rad

# How did we calculate this triangle?

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. ### 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.