In this Fig., AB || CD and EF is a transversal. Find the measure of all the other angles.
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Step-by-step explanation: ∠ 45 ° =∠a [ opposite angles are equal]
∠a + ∠b = 180° [ linear pair]
45° + ∠ b = 180°
∠b = 180° - 45°
= 135°
∠b = ∠c [ opposite angles are always equal]
=135°
45 ° = ∠ d [ interior alternate angles ]
∠ d = ∠ f [ opposite angles are always equal]
= 45 °
∠ c =∠ e [ interior alternate angles]
=135°
∠ b = ∠ g [ exterior alternate angles]
=135°
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