Find the area $ A $ of a pyramid if side $a = 28$ and slant height $s = 26$.

$A = 2240$

STEP 1: find base area $ B $

To find base area $ B $ use formula:

$$ B = a^2 $$

After substituting $ a = 28 $ we have:

$$ B = 28^2 $$ $$ B = 784 $$

STEP 2: find lateral surface $ L $

To find lateral surface $ L $ use formula:

$$ L = 2 \cdot a \cdot s $$

After substituting $ a = 28 $ and $ s = 26 $ we have:

$$ L = 56 \cdot 26 $$$$ L = 1456 $$

STEP 3: find total surface $ A $

To find total surface $ A $ use formula:

$$ A = B + L $$

After substituting $ B = 784 $ and $ L = 1456 $ we have:

$$ A = 784 + 1456 $$ $$ A = 784 + 1456 $$ $$ A = 2240 $$

Pyramid Calculator