Practicing Success
Practicing Success
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Find the value of (α + β)?
|
80 90 70 100 |
90 |
In Δ ABC: Exterior angle (∠C) = ∠A + ∠B = α + 60° In Δ CDF: Exterior angle (∠F) = ∠C + ∠B = α + 60° + β ⇒ 60° + α + β = 150° ⇒ α + β = 90° |
