If angle AOC + angle BOC from a linear pair and a-b = 80°. find a and b?
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let ∠AOC = a
∠BOC = b
a + b = 180° ------(1)
a - b = 80° ------(2)
On adding (1) and (2)
a + b + (a - b) = 180° +80°
a + b +a - b = 260°
2a = 260°
a = 130°
if a = 130, then,
130° + b = 180°
∴b = 50°
∠BOC = b
a + b = 180° ------(1)
a - b = 80° ------(2)
On adding (1) and (2)
a + b + (a - b) = 180° +80°
a + b +a - b = 260°
2a = 260°
a = 130°
if a = 130, then,
130° + b = 180°
∴b = 50°
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