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21. It is the sum of all areas of lateral faces and bases of a solid figure.
A. Base area
C. Surface area
B. Lateral area
D. None of the above
22. A flat pattern that you can fold to form a solid figure is called alan
A. area
C. face
B. edge
D. net
23. The surface area of a cube is times the area of its face.
A. three
C. five
B. four
D. six​

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Answer:

21. B. Lateral Area

22. D. Net

23. D. Six

Step-by-step explanation:

21. The lateral surface area of a solid is the surface area of the solid without the bases.

22. A flat pattern that you can fold to form a solid figure is called a net.

23. Recall that a cube has all edges the same length (See Cube definition). This means that each of the cube's six faces is a square. The total surface area is therefore six times the area of one face.

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