Match the terms (1-9) with the definitions (A-I).

Solution:

• 1. height - D. the amount that something is high
• 2. vertical - F. being straight up and down
• 3. sphere - A. a solid, round figure
• 4. octagon - I. a figure with eight sides and eight angles
• 5. triangle - E. a figure with three sides and three angles
• 6. surface area - H. the measurement of an object's outer layer
• 7. length - C. how long something is in size
• 8. volume - B. the amount of space that an object takes
• 9. circle - G. a round figure formed by a curved line

Explanation:

• Height (D): Refers to the measurement of how tall something is from bottom to top.
• Vertical (F): Describes a direction or orientation that is straight up and down, perpendicular to a horizontal surface.
• Sphere (A): A perfectly round geometrical object in three-dimensional space, like a ball.
• Octagon (I): A polygon with eight sides and eight angles.
• Triangle (E): A polygon with three sides and three angles.
• Surface area (H): The total area of the outer surface of a three-dimensional object.
• Length (C): Refers to the measurement of how long something is from end to end.
• Volume (B): The amount of three-dimensional space occupied by an object.
• Circle (G): A round plane figure whose boundary (the circumference) consists of points equidistant from a fixed centre.

Final Answer: 1-D, 2-F, 3-A, 4-I, 5-E, 6-H, 7-C, 8-B, 9-G