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koban [17]
3 years ago
11

Please help me I’m so lost

Mathematics
2 answers:
bearhunter [10]3 years ago
7 0

Answer:

128

Step-by-step explanation:

Side a

11.314

cm

Area

128

cm²

Diagonal

16

cm

Perimeter

45.255

cm

Gala2k [10]3 years ago
3 0
The side length of the square is 2*((8/2)^.5) = 4cm
The area is 4^2 = 16 cm

See the attached picture. The parts labeled a and b are both the same length since this is a square. And each of them is half of the side length of the square. We can find the length of a and b using the Pythagorean theorem because the 8cm is a hypotenuse of a right triangle. So we find a, and multiply by 2 to get the square side length. Then we square that to get the square area.

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