A
C
D
P
1
2
B
鐩镐技褰㈢郴鍒楀涔犱竴
涓婃捣甯傛睙闀囦腑瀛?/p>
濮滄鍐?/p>
鏁欏鐩爣锛?/p>
1
銆?/p>
鎺屾彙鐩镐技涓夎褰㈢殑鍒ゅ畾鍜屾�ц川锛屽苟鑳界啛缁冭繍鐢ㄥ叾瑙ｅ喅鏌愪竴閲嶈绫诲瀷鈥滀竴绾夸笁绛夎鈥濈殑缁?
鍚堥銆?/p>
2
銆?/p>
缁忓巻杩愮敤鐩镐技涓夎褰㈢殑鍩虹鐭ヨ瘑瑙ｅ喅闂鐨勮繃绋嬶紝鍐嶆浣撻獙鍥惧舰杩愬姩銆佸垎绫昏璁恒�佹柟绋?
涓庡嚱鏁扮瓑鏁板鎬濇兂銆?/p>
3
銆?/p>
閫氳繃闂鐨勮В鍐筹紝浣撻獙鎺㈢┒闂鎴愬姛鐨勪箰瓒ｏ紝绉瀬鎺㈢储锛屾彁楂樺涔犲嚑浣曠殑鍏磋叮銆?/p>
閲嶇偣闅剧偣锛?/p>
1
銆?/p>
鐩镐技涓夎褰㈢殑鍒ゅ畾銆佹�ц川鍙婂叾搴旂敤
2
銆?/p>
涓庣浉浼笺�佸嚱鏁版湁鍏崇殑缁煎悎鎬ч棶棰樼殑瑙ｅ喅鎶�宸у拰鏂规硶銆?/p>
鏁欏鏂规硶锛氬惎鍙戝紡鏁欏娉曘�佸皾璇曟寚瀵兼暀瀛︽硶銆?/p>
鏁欏杩囩▼锛?/p>
涓�銆佸涔犳彁闂?/p>
1
銆佺浉浼间笁瑙掑舰鐨勬蹇碉紝
2
銆佺浉浼间笁瑙掑舰鐨勫垽瀹氾紝
3
銆佺浉浼间笁瑙掑舰鐨勬�ц川
浜屻�佷粠璇炬湰渚嬮璇村紑鍘伙紝寮曞嚭涓婚
锛?/p>
P.38
锛?/p>
渚嬮
6
濡傚浘锛?/p>
宸茬煡鈻?/p>
ABC
涓紝
AB=AC=10
锛?/p>
BC=16
锛?/p>
鐐?/p>
P
銆?/p>
D
鍒嗗埆鍦ㄨ竟
BC
銆?/p>
AC
涓婏紝
BP=12
锛?/p>
鈭?/p>
APD=
鈭?/p>
B.
姹?/p>
CD
鐨勯暱
.
閫氳繃姝や緥寮曞瀛︾敓灏嗚瘉鏄庘柍
ABP
涓庘柍
PCD
鐩镐技鐨勮繃绋嬩竴鑸寲
.
杩涗竴姝ヨ嫢鎶婄偣
P
鐪嬩綔鏄瓑鑵?/p>
涓夎褰?/p>
ABC
搴曡竟
BC
涓婄殑涓�涓姩鐐癸紝
淇濇寔鈭?/p>
APD=
鈭?/p>
B
锛堝叾涓偣
D
鍦?/p>
BC
杈逛笂锛?/p>
锛?/p>
鍒欑偣
P
鍦ㄤ笂绉诲姩
鐨勮繃绋嬩腑锛?/p>
鎬绘湁鈻?/p>
ABP
涓庘柍
PCD
鐩镐技鍚楋紵杩涜�岀偣鍑哄湪涓�鏉＄洿绾?/p>
A
B
涓?/p>
鈭?/p>
B
銆?/p>
鈭?/p>
C
銆?/p>
鈭?/p>
APD
涓夎鐩?/p>
绛夌殑鐗规畩鎬с�?/p>
涓夈�佷範棰樹妇闅咃紝鐩存墸涓婚
銆?/p>
锛堥�氳繃涓�閬撶畝鍗曠殑渚嬮璁茶В鍙婂叾鍙樺紡缁冧範锛屽垵姝ヨ璇嗘湰鑺傝鐨勫涔犻鍨嬨�?/p>
锛?/p>
渚?/p>
1
銆佸鍥撅紝
A
D
鈭?/p>
BC,AD
鈮?/p>
BC
,
鈭?/p>
D
=90
0
,
鍦ㄨ竟
DC
涓婃湁涓�鐐?/p>
P
锛屼娇寰椻垹
APB
=90
0
,
闂細鈻?/p>
ADP
涓庘柍
BPC
鐩镐技鍚楋紵
璇佹槑锛氣埖
A
D
鈭?/p>
BC
鈭粹垹
D
+
鈭?/p>
C
=180
0
鈭碘垹
D
=90
0
鈭粹垹
C
=
鈭?/p>
D
=90
0
鍙堚埖鈭?/p>
APB
=90
0
鈭粹垹
C
=
鈭?/p>
D
=
鈭?/p>
APB
鈭碘垹
APC
=
鈭?/p>
D
+
鈭?/p>
1
鈭?/p>
APC
=
鈭?/p>
APB
+
鈭?/p>
2
鈭粹垹
1=
鈭?/p>
2
鈭粹柍
ADP
鈭解柍
PCB
锛堣ˉ鍏咃細鈭?/p>
1=
鈭?/p>
2
鐨勮瘉鏄庝篃鍙互鍒╃敤鈥滃悓瑙掔殑浣欒鐩哥瓑鈥濊繘琛岃瘉鏄庯紝鍗斥垹
1+
鈭?/p>
APD
=
鈭?/p>
APD
+
鈭?/p>
2=90
0
.)
鍙樺紡缁冧範涓�
:
褰撶偣
P
鍦?/p>
CD
涓婅繍鍔紝浣垮緱鈭?/p>
APB
=90
0
涓嶅彉锛屸柍
ADP
涓庘柍
PCB
杩樼浉浼煎悧锛燂紙杩愮敤澶氬獟浣撴紨绀猴紝
瀛︾敓鍙ｇ瓟锛?/p>
鍙樺紡缁冧範浜岋細
褰撶偣
P
鍦?/p>
CD
涓婅繍鍔紝
涓斺垹
APB
=90
0
涓嶅彉锛?/p>
鈻?/p>
APB
涓庘柍
PCB
浼氱浉浼煎悧锛熷鏋滅浉浼硷紝
鐐?/p>
P
鍦ㄤ粈涔堜綅缃憿锛燂紙瀛︾敓鍔ㄦ墜灏濊瘯鎬ф搷浣滐紝鍙垎缁勪氦娴侊級
鎺㈣缁撴灉锛氬綋鐐?/p>
P
鍦?/p>
CD
鐨勪腑鐐规椂锛屸柍
ADP
鈭解柍
PCB
鈭?/p>
鈻?/p>
APB
璇佹槑锛?/p>
锛堝鐢熷彛杩帮紝鏁欏笀鏉挎紨锛?/p>