Re: [計量] 兩題數學
看板GRE (GRE入學考試)作者Melancholy7 (Anachronism)時間17年前 (2008/08/23 17:55)推噓0(0推 0噓 3→)留言3則, 2人參與討論串11/14 (看更多)
※ 引述《murai111 (明鏡止水)》之銘言：
: 16. The area of town A which lies in city B is 20% of the area of
: city B not in town A
: Col A: Ratio of area of A to that of B
: Col B: 18%
: 之前PO過類似的 這次Col B不一樣
: 之前板友有人算Col A=1/6
: 不過韓網答案給A
: 有人有不同的解題法嗎
x = A
y < B
x = y/5
x + y = B = 6x = 6A
A/6A = 0.166666.....
Col B > Col A
: Given two triangles, one triangle inserted in another as above.
: The vertices of big triangle is ABC & smaller triangle i.e.
: the inner triangle is PQR such that AB//PQ and AC//PR.
: Given angle A is y degrees, angle R is z degrees & exterior angle of
: A is x degrees.
: Col A: x
: Col B: y+z
: 韓網給C
: 我想不太透
No picture, no truth.
angle A = angle P = y
y + x = 180
Two triangles may be not similar.
y + z ?? 180 - y
Information isn't enough.
--
※ 發信站: 批踢踢實業坊(ptt.cc)
◆ From: 122.124.97.206
→
08/23 17:59, , 1F
08/23 17:59, 1F
→
08/23 18:00, , 2F
08/23 18:00, 2F
→
08/23 20:05, , 3F
08/23 20:05, 3F
討論串 (同標題文章)
GRE 近期熱門文章
PTT職涯區 即時熱門文章
