We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.

+0

# https://snag.gy/jC5FN0.jpg

0
307
1

https://snag.gy/jC5FN0.jpg

Mar 2, 2018

### Best Answer

#1
+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+0 Answers

#1
+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