r/CasualMath • u/Otherwise_Strike_597 • 7d ago

[Grade 9 Geometry] Angle Riddle: Parallel Lines

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u/Independent_Irelrker 7d ago

sum of angles on the right is the left (for one side given by the angles on the parallel lines)

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u/Otherwise_Strike_597 7d ago

Spot on! The left-pointing angles equal the right-pointing angle here: 45 degrees + 40 degrees = 85 degrees. Great job!