Question

which principle ensures two shapes have the exact same size and shape?
a. proportionality
b. parallelism
c. similarity
d. congruence

Explanation:

• Proportionality: Deals with relative size relationships, not exact same size and shape.
• Parallelism: Concerns lines or planes being parallel, not shape - size identity.
• Similarity: Means same shape but not necessarily same size.
• Congruence: By definition, two shapes are congruent if they have the exact same size and shape.

Answer:

d. Congruence