Question

如图,在△ABC中,AD是BC边上的高线,AE是△ABC的角平分线

Answer 1

因为∠ADE = 90,∠EAD = 90 - ∠AED∠AED = ∠B + ∠BAE = α + ∠A / 2 = α + (180 - α - β) / 2∠EAD = 90 - ∠AED = 90 - 90 +α/2 - β/2 =&...