Question

what is the person measuring?

• the area of the tree
• the circumference of the tree
• the diameter of the tree
• the radius of the tree

Explanation:

Analyze the measurement tool and setup

The image shows a person using a caliper-like tool (specifically, a tree caliper) to measure the straight-line distance across the trunk of a tree from one side to the other through its center.

Identify the corresponding geometric term

A straight-line segment that passes from side to side through the center of a circular object (like a tree trunk cross-section) represents its diameter.

Answer:

• The area of the tree
• The circumference of the tree
• The diameter of the tree (Correct answer)
• The radius of the tree