Question

1. if two triangles have all three sides of equal length, they are _. similar none of the above not equal congruent

Explanation:

To solve this, we recall the definitions:

• Similar triangles: Have corresponding angles equal and sides in proportion (not necessarily equal length).
• Congruent triangles: Have all corresponding sides and angles equal (so if all three sides are equal, they are congruent).
• "Not equal" is incorrect as equal - length sides would make them equal in shape and size. "None of the above" is incorrect as congruent fits.

So the correct term for triangles with all three sides of equal length is congruent.

Answer:

D. congruent (assuming the last option is labeled D; if the original labels were different, adjust the identifier, but the text is "congruent")