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①は、底辺が８の正四角錐の高さが9なので
8×8×9×3/1＝192
②は、底面積が８×８＝64
側面積が、二等辺三角形×3個なので、
8×8÷2×3＝96
64+96=160
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①は、底辺が８の正四角錐の高さが9なので
8×8×9×3/1＝192
②は、底面積が８×８＝64
側面積が、二等辺三角形×3個なので、
8×8÷2×3＝96
64+96=160
Users viewing this question
are also looking at these questions 😉
