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ratelena [41]
3 years ago
15

Can someone please answer. There is one problem. There's a picture. Thank you.

Mathematics
2 answers:
svetoff [14.1K]3 years ago
5 0
You have to find the area of each face and add them all together. You also need to find the unknown side which is indicated in the picture i attached.
Download pdf
beks73 [17]3 years ago
5 0
Split it into a net shape and find he areas

if you look and reead carefully

equilataral, means all sides are equal, also means that te heights of all side rectangles are the same

so we only need to find the area of the 2 triangles and the 3 rectangles


area of triangle=1/2bh
b=5
h=4.3
since 2 triangles, times 2
1/2*2*5*4.3=21.5


the 3 rectangles
area=legnth times width
legnth=20
width=5
3 of them so times 3
3*20*3=300


find total by adding

21.5+300=321.5
2nd is anser
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