3 years ago

Help me find the surface area :)

Mathematics

2 answers:

n200080 [17]3 years ago

4 0

I also got 289 as an answer

Ede4ka [16]3 years ago

3 0

Answer:

Step-by-step explanation:

unknown base side = √7²+7²= √98=7√2

SA = (2×½×7×7)+ (7+7+7√2)(10)

= 49 + 140 + 70√2

= (189 + 70√2) ft²

= 287.99 ft²

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