Working out perimeters

This task is about using algebraic expressions to find lengths of a shape.
diagram of a shape with side lengths marked

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a) Write an expression, in its simplest form, for the length of
i)   side Q: 
ii)  side R: 

Question 2Change answer

b) i) Write an expression that would allow you to find the length of the perimeter around the shape.

Question 2Change answer

ii) Simplify your expression.

Question 2Change answer

c)  Use your expression in b) ii) to find the value of x for a perimater of 104cm.
     Show all your working in your calculation.