Enter Side (a)

Equilateral Triangle
  

Given an equilateral triangle with side (a) equal to 20

Calculate the other relevant items in this triangle

Calculate Perimeter:

P = 3a

P = 3 x 20

P = 60

Calculate Semiperimeter s:

s  =  P
  2

s  =  60
  2

s = 30

Calculate Area (A):

A  =  a23
  4

A  =  2023
  4

A  =  400√3
  4

A  =  692.82032302755
  4

A = 173.20508075689

Calculate Bisector

ha-ma-ta  =  a√3
  2

ha-ma-ta  =  34.641016151378
  2

ha-ma-ta = 17.320508075689

Calc. Circumscribed Circle Radius

R  =  a√3
  3

R  =  34.641016151378
  3

R = 11.547005383793

Calculate Inscribed Circle Radius

r  =  a√3
  6

r  =  34.641016151378
  6

r = 5.7735026918963



P = 60
s = 30
A = 20



What is the Answer?
P = 60
s = 30
A = 20
How does the Equilateral Triangle Calculator work?
Free Equilateral Triangle Calculator - Given a side (a), this calculates the following items of the equilateral triangle:
* Perimeter (P)
* Semi-Perimeter (s)
* Area (A)
* altitudes (ha,hb,hc)
* medians (ma,mb,mc)
* angle bisectors (ta,tb,tc)
* Circumscribed Circle Radius (R)
* Inscribed Circle Radius (r)
This calculator has 1 input.

What 3 formulas are used for the Equilateral Triangle Calculator?

P = 3a
s = ½P
A = a22√3/4

For more math formulas, check out our Formula Dossier

What 6 concepts are covered in the Equilateral Triangle Calculator?

altitude
segment from the vertex of a triangle ot the other side of the triangle
area
Number of square units covering the shape
equilateral triangle
A triangle with 3 equal sides
perimeter
The distance around a shape or object
radius
Distance from the center of a circle to the edge
C/2π
triangle
a flat geometric figure that has three sides and three angles
Example calculations for the Equilateral Triangle Calculator

Equilateral Triangle Calculator Video


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