Equilateral Triangle side = 11

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Enter Side (a)

Given an equilateral triangle with side (a) equal to 11

Calculate the other relevant items in this triangle

Calculate Perimeter:

P = 3a

P = 3 x 11

P = 33

Calculate Semiperimeter s:
s  =  P
  2

s  =  33
  2

s = 16.5

Calculate Area (A):
A  =  a2√3
  4

A  =  112√3
  4

A  =  121√3
  4

A  =  209.57814771583
  4

A = 52.394536928959

Calculate Bisector
ha-ma-ta  =  a√3
  2

ha-ma-ta  =  19.052558883258
  2

ha-ma-ta = 9.5262794416288

Calc. Circumscribed Circle Radius
R  =  a√3
  3

R  =  19.052558883258
  3

R = 6.3508529610859

Calculate Inscribed Circle Radius
r  =  a√3
  6

r  =  19.052558883258
  6

r = 3.1754264805429

P = 33
s = 16.5
A = 11

You have 1 free calculations remaining


What is the Answer?

P = 33
s = 16.5
A = 11

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?

altitudesegment from the vertex of a triangle ot the other side of the triangleareaNumber of square units covering the shapeequilateral triangleA triangle with 3 equal sidesperimeterThe distance around a shape or objectradiusDistance from the center of a circle to the edge
C/2πtrianglea 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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