In trianhle ABC A plus B = 108 and B plus C = 130 find all angles
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A+B=108°
B+C=130°
A+B+C=180° Angle sum prop
substitute the value of A+B
108°+C=180°
C=180°-108°
C=72°
B+C=130°
B+72°=130°
B=130°-72°
B=58°
A+B=108°
A+58°=108°
A=108°-58°
A=50°
B+C=130°
A+B+C=180° Angle sum prop
substitute the value of A+B
108°+C=180°
C=180°-108°
C=72°
B+C=130°
B+72°=130°
B=130°-72°
B=58°
A+B=108°
A+58°=108°
A=108°-58°
A=50°
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