Question

problem 14: (first taught in lesson 17) from this given statement, select the definition, property, postulate, or theorem that justifies the prove statement. given: △ghk prove: m∠1 + m∠4 = 180

Explanation:

Angles ∠1 and ∠4 form a linear pair. By the Linear - Pair Postulate, two angles that form a linear pair are supplementary, meaning their measures add up to 180 degrees.

Answer:

The Linear - Pair Postulate.