Question

The net of a pyramid is shown below:

Answer 1

Surface area  = area of the square + 4 times area of one triangle 

= 7*7 + 4(1/2 * 7 *14)

= 49 + 4*49  = 245 sq ins

Answer 2

Answer:

245 square in.

Step-by-step explanation:

DO NOT REPORT ME FOR TAKING OFF OF LAST THIS IS JUST ANOTHER EASIER WAY.

first we do 7x7=49 then 2(7 x 14)=2 x 98= 196 now we add: 49+196=245.

The reason this works is that if you have two of the same size triangles you do not need to divide by .5 which is 1/2 and we have to pairs so we can delete the 1/2 or .5 then times by two, typically dividing the 4 by a half. it's faster and easier. For 4 times 49 is hard 2 times 98 is a pinch easier.