February 16th, 2019, 05:46 AM  #1 
Member Joined: Aug 2018 From: Nigeria Posts: 73 Thanks: 2 
The slant edge of a right pyramid with rectangular base is 14.6cm and the height is 1.2cm. If the length of one of the sides of the base is 8.4cm, find the surface area.
Last edited by skipjack; February 16th, 2019 at 06:29 AM. 
February 16th, 2019, 07:29 AM  #2 
Global Moderator Joined: Dec 2006 Posts: 20,484 Thanks: 2041 
If you find right triangles and use Pythagoras, what progress can you make?

February 16th, 2019, 09:54 AM  #3 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 14,344 Thanks: 1024  