Question

Two equal sides of an isosceles triangle are3x-1and2x+2units. The third side is 2x units. Find x and the perimeter of the triangle

Answer 1

Given, Two equal sides i.e 

3x - 1 = 2x + 2 

3x - 2x = 2 + 1 

x = 3    -------------- (1)

Perimeter of triangle  will be sum of length of all three sides.

= (3x - 1) + (2x + 2) + (2x) 

= 3x - 1 + 2x + 2 + 2x 

= 7x + 1 

= 7(3) + 1(From (1))

= 22.


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Answer 2

Given that: Two equal sides of an isosceles triangle are3x-1and2x+2units. The third side is 2x units.

we have to find: x and the perimeter of the triangle

Solution:-
because two equal sides of isosceles triangle are : 3x-1and2x+2units
therefore : 3x-1 = 2x+2
=> 3x-2x = 2+1 => x= 3
the third side of the triangle is= 2x = 2×3 = 6 units
and the equal sides = 2x+2 = 3x-1
=> 2×3+2 = 8 units

now parameter is equal to 6 +8+8 = 22 units Answer

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