已知正三棱柱的底面边长为1,侧棱长为2求表面积和体积 已知一个正三棱柱的底面边长为a，高为h，写出一个求正三棱柱的...
\u5df2\u77e5\u6b63\u4e09\u68f1\u67f1\u7684\u5e95\u9762\u8fb9\u8fb9\u957f\u4e3aa,\u4fa7\u68f1\u957f\u4e3al\uff0c\u6c42\u5176\u4f53\u79efv\u3002\u5199\u51fa\u89e3\u51b3\u6b64\u95ee\u9898\u7684\u7b97\u6cd5\u6b65\u9aa4\u548c\u7a0b\u5e8f\u5bf9\u4e8eY\u8f74\u7684B1A1 B1A1\u4e2d\u70b9O\u70b9\u4e3aX\u8f74\uff0cOC1 BA\u4e2d\u70b9O1 Z\u8f74OO1\uff0c\u5efa\u7acb\u5750\u6807\u7cfb\u7edf;
\uff081\uff09A\uff080,1 /2\u03b1\uff0c2A\uff09\u4e2d\uff0cB\u7684\u5750\u6807\uff080\uff0c-1/2a\uff0c2a\uff09\u4e2d\uff0cA1\u7684\u5750\u6807\uff080,1 /2\u03b1\uff0c0\uff09\uff0cB1\u7684\u5750\u6807\u7684\u5750\u6807\uff080 \uff0c-1/2a\uff0c0\uff09;
\uff082\uff09\u7531\u4e8e\u6b63\u4e09\u68f1\u67f1\uff0c\u5b83\u662f\u5782\u76f4\u4e8e\u9762ABB1A1\u8868\u9762C1B1A1\u4e2d\uff0c\u8fde\u63a5\u7684AO\uff0c\u6240\u4ee5OC1\u7684AO\u8fde\u63a5\u5782\u76f4AC1-\u76f4\u89d2\u4e09\u89d2\u5f62\u4e09\u89d2\u5f62\u7aefAOC1\u3002 A1B1C1\u7279\u6027\u7b49\u8fb9??\u4e09\u89d2\u5f62\uff0c\u6240\u4ee5OC1\u662f\u4e09\u5206\u4e4b\u4e8c\u7684\u6839\u53f75\uff0c\u56e0\u4e3aAA1\u662f2\u03b1\uff0cA1C1\u4e3aAC1\u4f5c\u4e3a\u6839\u65705\uff0c\u6240\u4ee5\u89d2\u5ea6C1AA1\u662f30\u5ea6\uff0c\u6240\u4ee5AC1\u4e0e\u4fa7ABB1A1\u5f62\u6210\u7684\u89d2\u4e3a30\u5ea6\u3002
\u5e95\u9762\u5468\u957f:3a\uff0c \u4fa7\u9762\u79ef3a*h;
\u5e95\u9762\u79ef:(4\u5206\u4e4b\u6839\u53f73)a
\u4f53\u79ef=\u5e95\u9762\u79ef*h
\u8868\u9762\u79ef=2*\u5e95\u9762\u79ef+\u4fa7\u9762\u79ef
S侧=3*（S侧1）=3*1*2=6
S=S底+S侧=（根号三）/2
V=1*{（根号三）/2}*2=根号三
表面积：1+2*1*3=7
体积：0.25*2*1/3=1/6
表面积：1+2*1*3=7
体积：0.25*2*1/3=1/6
表面积：1/2*1*（根号3）/2+2*1*3
体积：1/2*1*（根号3）/2*2
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