find the lettered angle
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Answer:
L c = 180⁰ - ( 90⁰ + 50⁰) (angle sum property)
L c = 180⁰ - 140⁰
L c = 40⁰
L x = 180⁰ - (100⁰ + 40⁰) (angle sum property)
L x = 180⁰- 140⁰
L x = 40⁰
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