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https://snag.gy/jC5FN0.jpg

 Mar 2, 2018

Best Answer 

 #1
avatar+18360 
+2

The surface area for a square pyramid is given by

 

Area = a^2 + 2a sqrt (( a^2)/4 +h^2)        (No, I didn't know that...I looked it up)

 

We have    a = 20   we just need to find h

 

tan (55) = h/10     h= 14.2814

 

Area = 20^2 + 2(20) sqrt (  400/4  + 7.14^2)  =1097.38 cm^2

 Mar 2, 2018
edited by ElectricPavlov  Mar 2, 2018
 #1
avatar+18360 
+2
Best Answer

The surface area for a square pyramid is given by

 

Area = a^2 + 2a sqrt (( a^2)/4 +h^2)        (No, I didn't know that...I looked it up)

 

We have    a = 20   we just need to find h

 

tan (55) = h/10     h= 14.2814

 

Area = 20^2 + 2(20) sqrt (  400/4  + 7.14^2)  =1097.38 cm^2

ElectricPavlov Mar 2, 2018
edited by ElectricPavlov  Mar 2, 2018

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