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

1/3 + 1/5 = 8/15.

step-by-step explanation:

hope it

c

step-by-step explanation:

i think because what else can be a sample of every member

191 students play sports and ninety-seven 10th graders were surveyed.

step-by-step explanation:

answer: the distance

step-by-step explanation:

to calculate the distance d of a line segment with endpoints (x1, y1) and (x2, y2) use the formula d (x2 x1)2 (y2 y1)2. to calculate the midpoint of a line segment with endpoints (x1, y1) and (x2, y2) use the formula