Question
Find the perimeter $ P $ of a rectangle if side $a = \frac{ 7 }{ 2 }\, \text{cm}$ and side $b = \frac{ 5 }{ 2 }\, \text{cm}$.
Answer
$12\, \text{cm}$
Explanation
To find perimeter $ P $ use formula:
$$ P = 2 a + 2 b $$After substituting $a = \dfrac{ 7 }{ 2 }\, \text{cm}$ and $b = \dfrac{ 5 }{ 2 }\, \text{cm}$ we have:
$$ P = 2 \cdot \frac{ 7 }{ 2 }\, \text{cm} + 2 \cdot \frac{ 5 }{ 2 }\, \text{cm} $$ $$ P = 7\, \text{cm} + 5\, \text{cm} $$ $$ P = 12\, \text{cm} $$This page was created using
Rectangle Calculator