Question

sort the words according to the meanings of their shared roots.
shape or structure
ten
formation
decade
uniform
decimal
decathlon
formula

Explanation:

To solve this, we analyze word roots:

• For "shape or structure": Words with root related to form/structure. "formation" (process of forming), "uniform" (consistent form), "formula" (structured rule) fit.
• For "ten": Words with root related to ten. "decade" (ten years), "decimal" (base - ten), "decathlon" (ten events) fit.

Answer:

• "shape or structure" group: formation, uniform, formula
• "ten" group: decade, decimal, decathlon