Short Answer

Geometric Foundations in Equation Modeling

A technical drafting assistant is calculating the two unknown acute angles, aa and bb, for a right-triangular support brace. To translate the geometric requirements into a system of equations, the assistant writes the equation a+b+90=180a + b + 90 = 180. State the specific name of the geometric property or theorem that justifies the sum of the angles used in this equation.

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Updated 2026-04-18

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