Question

Find the areas of the shaded region of the 3D figures given in question number 3.​

Answer 1

$\underline { \red { Finding \: number \:of \: unit \:cubes \:in \:3-D\:figures :}}$

$Number \: of \: unit \:cubes \: in \:Figure \: i)\\= 2 + 3\\= 5$

$Number \: of \: unit \:cubes \: in \:Figure \: ii)\\= 2 + 4 + 1\\= 9$

$Number \: of \: unit \:cubes \: in \:Figure \: iii)\\= 4 + 16$

$\blue { ( Top = 2\times 2 = 4 )}$

$\blue { ( Bottom = 4\times 4 = 16 )}$$= 20$

$Number \: of \: unit \:cubes \: in \:Figure \: iv)\\= 1 + 4 + 9\\= 14$

Therefore.,

$\red {Number \: of \: unit \:cubes \: in \:Figure \: iii)} \green {= 20 }$

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Answer 2

Answer:

find the area of this figure of shaded region