Problem 7: Find the value of x if the perimeter of the shape is given x below it : Perimeter = 28 cm x = ——————————————
Solution:
Perimeter is defined as the total length of the boundaries;
So here;
\[ Perimeter= 2cm+1cm+2cm+3cm+6cm+4cm+1cm+2cm+x=21cm+x \]
But perimeter is given as 28cm
it means;
\[ 28=x+21 \]
so,
\[ x=7cm \]