Mathematics ACT Aspire Practice Test 2025 – Complete Study Resource

Question: 1 / 400

What is the term for angles that are congruent and formed when two lines intersect?

Complementary angles

Adjacent angles

Vertical angles

The term for angles that are congruent and formed when two lines intersect is vertical angles. When two lines cross each other, they create two pairs of angles that are opposite each other. These opposite angles are known as vertical angles, and they are always equal in measure, which is the defining characteristic making them congruent.

In contrast, complementary angles refer to two angles that add up to 90 degrees, while supplementary angles add up to 180 degrees. Adjacent angles are those that share a common side and vertex but do not overlap. Understanding these definitions is key to distinguishing vertical angles from the other types. Thus, vertical angles are the correct answer due to their congruence and association with intersecting lines.

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Supplementary angles

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