Final answer:
By using similar triangles and setting up a proportion with the giraffe's height and shadow, we find that Corry is 6 feet tall.
Step-by-step explanation:
To solve for Corry's height using similar triangles, we set up a proportion using the given measurements of the giraffe and its shadow, and Corry and his shadow. The ratio of the giraffe's height to its shadow is the same as the ratio of Corry's height to his shadow because of similar triangles.
To find Corry's height (h), we have:
Giraffe's height / Giraffe's shadow = Corry's height / Corry's shadow
18 feet / 12 feet = h / 4 feet
By cross-multiplying and solving for h:
12h = 18 × 4
12h = 72
h = 72 / 12
h = 6 feet
Therefore, Corry is 6 feet tall.