面積S
C
5=
a-x.
écra² C-
20-
a
H
h
B
(²) + AH² = 1²
AH²
20
ax√²-²x =
2a
AH
a-x-H
c²-[a-x)²=h²-x²
AH²=C²-(^-^)² C²-(a²-2aX+x²) = h²=X²
C²-A²+ 2ax-X²=h^²=X²
29
(a-x)+AH²=C²
X²+AH² =l²
AH² = £²-X³²
"AH": ^^ - (²²) S = a√ [ht La) Ch-hi-izl
24
20
2.
20x = li²³ (²+9²
X = K²=C²+α²₂²²
29.
S = = a√²=[^²=²+²/²+
20-