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anonymous
 one year ago
Find the surface area of a pyramid if its height is 4 cm and its base is a rectangle with side lengths 4 cm and 6 cm. Round to the nearest whole number.
anonymous
 one year ago
Find the surface area of a pyramid if its height is 4 cm and its base is a rectangle with side lengths 4 cm and 6 cm. Round to the nearest whole number.

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jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1What is the area of the base?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1dw:1435548018859:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1dw:1435548042782:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1dw:1435548055051:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1do you see how I got that triangle I just added?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1it's a right triangle with legs 3 and 4 the hypotenuse is what?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1dw:1435548291256:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1we will have 2 triangles on the lateral face of the pyramid that look like this dw:1435548321950:dw base = 4 height = 5

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1what is the area of that triangle?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1there are 2 of these triangles, so they add to 10+10 = 20 cm^2 the front and back faces dw:1435548418230:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1dw:1435548440907:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1dw:1435548484189:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So for the other 2 sides would the area be 15cm^2.

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1how are you getting 15?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0And the bottom area would be 6x4=24cm^2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I got 15 from multiplying 6x5=30/2=15cm^2. Would that not be correct?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1that other hypotenuse isn't 5

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1dw:1435548754459:dw

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1so you have 2 more triangles, each looking like this dw:1435548837682:dw

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Would i make 4.47 into 4 because the problem says to round the nearest whole number.

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1round when you're done calculating

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1so it might be better to use more decimal digits instead of 4.47 maybe use 4.47213595 or something \[\Large \sqrt{20} \approx 4.47213595\]

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1that's the area of one triangle there are 2 of them

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1Summary: you have a base that's 24 cm^2 the front and back triangles have a total area of 20cm^2 the left and right triangles have a total area of 26.832814 cm^2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The answer would be then 70.83 or 71cm^2 (the answer was in my book but i couldn't see what i was doing wrong THANK YOU SO MUCH :D)

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1you're welcome
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