An incomplete proof of the triangle sum theorem follows. Complete the proof by providing all missing statements and reasons. Given: AABC m || AC Prove: mLA + m2B+ m2C = 180° B 1 A A Image created with GeoGebra m

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Q: 4. Approximate m/B in the triangle below. A ∞ 11 m/B≈ 39.9° m/B≈ 46.5° m/B≈ 60.4° O m/B≈ 51.2° 7 B

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