Properties Of Equilateral Triangle  by  Joab Otieno

6

What is an equilateral triangle?

What are the properties of equilateral triangles.

  • The three sides of any equilateral triangle are equal.

  • The three angles are equal.

  • The angles measure 60 degrees each.

Question

Find the actual length of the missing sides of the equilateral triangle below. 
 
Step1
  • Equate the sides
  • 3x-1=11
Step 2
  • Collect like terms
  • 3x=11+1
  • *When 1crosses the equal sign it becomes positive that is to addition.
Step 3
  • Solve the equation to get the value of x
  •                     3x=12
  • Divide both sides by 3 to get the value of x
  • X=4

To show that the sides are equal

  • Replace x with 4
  • 3x-1 =11
  • 3×4=12
  • 12-1=11
Therefore all the sides are equal 

 



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