Answer:
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Step-by-step explanation:
Answer:

Step-by-step explanation:
The surface area formula for pyramids is given by :
...(1)
We need to arrange the formula for l.
Take b to LHS,
![S-b=\dfrac{1}{2}Pl\\\\2(S-b)=Pl\ [\text{cross-multiplying}]\\\\l=\dfrac{2(S-b)}{P}](https://tex.z-dn.net/?f=S-b%3D%5Cdfrac%7B1%7D%7B2%7DPl%5C%5C%5C%5C2%28S-b%29%3DPl%5C%20%5B%5Ctext%7Bcross-multiplying%7D%5D%5C%5C%5C%5Cl%3D%5Cdfrac%7B2%28S-b%29%7D%7BP%7D)
So, the expression is
for the slant height.
Answer:
A+ B is the radius of the circle
When we draw line AE it is also a radius of the circle
Line EC^2 = AE^2 -AC^2
Line EC^2 = 8^2 -5^2
Line EC^2 = 64 -25
Line EC^2 = 39
EC = square root of 39 = 6.2449979984
EC = 6.245 rounded.
Step-by-step explanation: