設(shè)底邊YCM,腰XCM
當(dāng)12cm部分包含底邊
X+1/2x=7
1/2x+y=12
2x>y
不構(gòu)成三角形,舍去
當(dāng)7CM部分包含底邊時(shí)
x+1/2x=12
1/2x+y=7
2x>y
x=8
y=3中線呢？？？？這個(gè)長(zhǎng)度·······不是把周長(zhǎng)分成兩個(gè)部分么？中線長(zhǎng)應(yīng)該不用算進(jìn)去中線長(zhǎng)(根號(hào)82)/2無(wú)語(yǔ)·····················································································································看看你的答案，任意倆邊之和大于第三遍，3+3＞8，，，牛?。?！我才真的無(wú)語(yǔ)，底邊3，腰長(zhǎng)8啊，底邊只有1條啊，大哥（大姐？）……中線呢？？？？這個(gè)長(zhǎng)度·······中線呢？？？？這個(gè)長(zhǎng)度·······