Angles whose measure adds up to 180 degrees

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Prepare for your Leaving Certificate Mathematics exam with a comprehensive practice test featuring key definitions. Use flashcards, multiple choice questions, and detailed explanations to ensure success and mastery of fundamental math concepts.

Multiple Choice

Angles whose measure adds up to 180 degrees

Explanation:
Supplementary angles are two angles whose measures add to 180 degrees. This links to a straight line: when two angles sit together along a straight line, their measures fill the 180 degrees of that line. If one angle is 110 degrees, the other must be 70 degrees to reach 180. They don’t have to be adjacent, but the key is their total equals 180. For contrast, complementary angles sum to 90 degrees, congruent angles have equal measures, and vertical angles are opposite angles formed by intersecting lines and are equal to each other.

Supplementary angles are two angles whose measures add to 180 degrees. This links to a straight line: when two angles sit together along a straight line, their measures fill the 180 degrees of that line. If one angle is 110 degrees, the other must be 70 degrees to reach 180. They don’t have to be adjacent, but the key is their total equals 180. For contrast, complementary angles sum to 90 degrees, congruent angles have equal measures, and vertical angles are opposite angles formed by intersecting lines and are equal to each other.

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