Gariskan maklumat tentang permukaan, sisi, bucu atau bentuk asas.
Langkah 1
Cari kata kunci ciri
Gariskan maklumat tentang permukaan, sisi, bucu atau bentuk asas.
permukaan · sisi · bucu · bentuk asas
permukaan · sisi · bucu = 面 · 边 · 顶点 先在题目里划出描述形状的词：几个面、面是平的还是弯的、几条边、几个顶点。这些数字和词就是找形状的线索，划出来才不会漏看。 例子：四角锥有1个正方形底面和4个三角形面，共1 + 4 = 5个面。 注意：面是一整片，边是两面相接的线，顶点是角上的点，别把三者数混。
permukaan · sisi · bucu = face · edge · vertex First underline every clue about the shape: how many faces, whether they are flat or curved, how many edges and vertices. These numbers point to one 3D shape, so mark them before guessing. Example: A square pyramid has 1 square base and 4 triangle faces, so 1 + 4 = 5 faces. Watch out: A face is a whole flat part, an edge is a line, and a vertex is a corner point.
Langkah 2
Teka dan uji
Pilih satu bentuk calon, semak semua cirinya, kemudian tolak bentuk yang tidak sepadan.
teka → semak semua ciri → putuskan
teka → semak semua ciri = 猜 → 检查全部特征 先选一个可能的形状，再把题目里的每个特征逐一对照。有一个特征不符合，就删掉它，换下一个。 例子：线索是6个面、12条边、8个顶点，猜长方体：6面对、12边对、8顶点对，全部符合才确定。 注意：只对上一个特征不能下结论，球和圆柱都有弯曲面。
teka → semak semua ciri = guess → check every feature Pick one possible shape, then test it against every clue in the question. If even one feature does not match, reject that shape and try the next one. Example: Clues say 6 faces, 12 edges, 8 vertices. Try a cuboid: 6 faces yes, 12 edges yes, 8 vertices yes, so it fits. Watch out: Matching only one clue is not enough, because a sphere and a cylinder both have a curved surface.
Langkah 3
Gunakan bentangan
Jika bentuk asas diberikan, bayangkan cara bahagian itu dilipat untuk menentukan bentuk 3D.
bentuk asas → lipat → bentuk 3D
bentuk asas → lipat = 展开图 → 折起来 如果题目给的是展开图，就想象把每一块沿线折起来，看会围成什么立体。先数一数展开图有几块、每块是什么形状。 例子：展开图有2个圆形和1个长方形，长方形卷起来、圆形盖住上下，就是圆柱，共2 + 1 = 3块。 注意：展开图的块数要等于立体的面数，少一块就围不起来。
bentuk asas → lipat → bentuk 3D = net → fold → 3D shape When a net is given, imagine folding each part along the lines and see what closed shape appears. Count the parts and name their shapes first. Example: A net with 2 circles and 1 rectangle rolls into a cylinder, with 2 + 1 = 3 parts. Watch out: The number of parts in the net must equal the number of faces; one missing part means it cannot close.
Semak cepat · Soalan 1 / 2
Cuba sendiri
Pilih jawapan. Jika belum tepat, baca petunjuk dan cuba lagi.
Kotak mempunyai 6 permukaan rata sama besar. Bentuknya…
permukaan rata sama besar = 一样大的平面 题目说盒子有6个平面，而且每个面一样大。要看两条线索：面的数目，和面的大小是否相同。逐个想每个选项有几个面、有没有弯曲面。 例子：长方体也有6个平面，但分成三种大小，2 + 2 + 2 = 6。 注意：只数到6个面还不够，还要检查“一样大”这个条件。
permukaan rata sama besar = flat faces of the same size The box has 6 flat faces and every face is the same size. Check each choice for two things: does it have any curved surface, and are all its faces equal? Example: A cuboid also has 6 flat faces, but they come in 3 pairs of different sizes: 2 + 2 + 2 = 6. Watch out: Counting 6 faces is not enough; the words sama besar mean equal size too.
Semak cepat · Soalan 2 / 2
Cuba sendiri
Pilih jawapan. Jika belum tepat, baca petunjuk dan cuba lagi.
Bekas mempunyai 2 permukaan rata dan 1 melengkung. Bentuknya…
rata · melengkung = flat · curved The container has 2 flat faces and 1 curved surface. The shape you choose must have both kinds, in exactly those numbers. Imagine it on a table: can it stand, and can it roll? Example: A cone has 1 flat face and 1 curved surface, 1 + 1 = 2 surfaces, so the count does not match. Watch out: Do not pick a shape just because it rolls; count the flat faces too.
Ringkasan
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Ingat: cari kata kunci ciri; teka dan uji; gunakan bentangan.
