Mathematics, 16.08.2021 17:20 lezapancakes13

Let ABC be an isosceles triangle at A. Draw BH perpendicular to AC(H belongs to AC), draw CK perpendicular to AB(K belongs to AB). a, Prove AH=AK
b, Let I be the intersection of BH and CK. Prove that AI is orthogonal to HK.
c, Draw Bx perpendicular to AB at B, let E be the intersection of Bx with AC. Prove BC is the bisector of angle HBE.
d, Compare CH with CE

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Let ABC be an isosceles triangle at A. Draw BH perpendicular to AC(H belongs to AC), draw CK perpend...