例題91
25
D
○ひらがBに垂規OHを下ろすと
<OAB = <ABH = 90° F/
OA LAB
T
0 A 11 BM
231 AB = OH ; AO = BH = F
7
MOHOT dc. 2. <Otto = 90° = '1
of
OH² = 00^-
= 25² -112-51
= 25²²-771²
32-18
= 25x2-3²
= 8² 3²
28²
BM I AB (Zaz"
=
OHTO より OH=24
AB = OH = ¹ 1 ₁ AB = 2Y &
0+3² 500 € 1 0 2 7 1 Tr.
O'HI CD, CO LCD FY
OH 4 co bas"
Co = DH = 5₁ CD = OH'
OH
f
二
400' HEJL ZOHO^ = 90° F (
OH ²
00 - ÓH
こ
>
25² — (12²+5)
f
25² - 17²
L
=
12. P
OH 70=1 OH = Y ) = 1
CD = OH F1. CD=x√7
4
DATE