֮ʹڵߵĹA348A߶βΡѡA
15.ʡͨ20113֣ͼABCDDCE80㣬BEF
A120 B110 C100 D80 𰸡C
㡿ƽߵʡ
ƽͬڽǻʣABCDDCE͡BEFͬڽǣӶBEF1800?800?1000ѡC
16.2012ͨ3֣֪?32o?IJΪ A58o B68o C148o D168o 𰸡C
㡿ǵĶ塣
ݻΪǵĺ͵180ʽ㼴ɵý⣺
ߡ?=32㣬?IJΪ180㣭32=148㡣ѡC
1. 2001ͨ2֣ͼֱL1ֱL2ཻ1402ĶΪ
𰸡140 㡿ƽǶ塣
ƽǵĶֱӼ㼴ɣ2=180118040140
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5. ʡͨ20022֣ һεڽǺ1440㣬ô Σ 𰸡ʮ
㡿ڽǺͶ
öεڽǺΪn-2?180㼴ɽ⣺
εıΪn⣬ãn2?180=1440㣬n=10
һʮΡ
6. ʡͨ20032֣μԳͼĶԳͼΣԳͼĶԳͼεͼβһΣ磬ԲԳͼĶԳͼΣԲΣѧļͼپӣֻҪдͼƣ 𰸡Σ߶Σ𰸲Ψһ 㡿ĶԳͼΣԳͼΡ
ԳͼκĶԳͼεĸֻҪдͼηͼεμɣ߶ΣżߵΡ
7. ʡͨдپ20053֣֪ϦϦ»࣬ҡϦ=3518䣬
Ϧ= . 𰸡5442 㡿ǡ
Ƕֱӽ𣺡Ϧ=90㣭Ϧ=90㣭3518=5442䡣
10. ʡͨ200 83֣֪A40㣬Aǵ ȣ 𰸡50 㡿ǡ
Ƕֱӽ𣺡Aǵ90㣭40=50㡣
11. ʡͨ20083֣ͼDEBCABACDE㣬CFΪBCӳ
ߣADE
50㣬ACF110㣬A ȣ
𰸡60
㡿ڽǺͶƽߵʡ
ƽߵʺεڽǺͶ⣺
DEBCAED=ACB=180㣭ACF=70㡣 A=180㣭70㣭50=60㡣
12. ʡͨ20113֣֪??20㣬??ǵ
𰸡70 㡿ǡ
ǵĶ壺ǵĺΪ90㣬ǻֱ࣬ӵó902070
1. ʡͨ20046֣ͼιĸ㣬ֲͬķҪƳĸֱ֣߷ָÿڸһ㣻ǸֵȡǦʻֻҪͼȷд
𰸡⣺𰸲Ψһ
㡿ͼӦͼεʡ
ĶԳͼΣԽߵĽ㣬һഹֱֱһͼηֳɵȡ
2. ʡͨдپ20055֣
֪: AOB,MN.
P,ʹPڡAOBƽ,PM=PN. Ҫó߹ͼ,ͼۼ,д
𰸡⣺AOBƽߣ߶MNĴֱƽߣĵQ
㡿ͼͼ
1AOBƽߣ2MNĴֱƽߣ߽㼴Ϊ 3. ʡͨдپ20066֣֪ABCͼABCԲҪó߹ͼͼۼдҪ֤
𰸡⣺£
1߶ABĴֱƽl1 2߶BCĴֱƽl2
3l1l2ĽOΪԲģOAΪԲԲԲOΪԲ
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