Question
Find the area $ A $ of a trapezoid if long base $a = 1100\, \text{cm}$, short base $b = 1000\, \text{cm}$ and height $h = 900\, \text{cm}$.
Answer
$945000\, \text{cm}^2$
Explanation
To find area $ A $ use formula:
$$ A = \frac{ (a + b) \cdot h}{ 2 }$$After substituting $ a = 1100 $ , $ b = 1000 $ and $ h = 900 $ we have:
$$ A = \frac{ (1100\, \text{cm} + 1000\, \text{cm}) \cdot 900\, \text{cm}}{ 2 }$$$$ A = \frac{ 2100\, \text{cm} \cdot 900\, \text{cm}}{ 2 }$$$$ A = \frac{ 1890000\, \text{cm}^2 }{ 2 }$$ $$ A = 945000\, \text{cm}^2 $$This page was created using
Trapezoid Calculator