Page 120 - คณิตศาสตร์ ม.ต้น พค.21001
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แบบฝกหัดที่ 3
1. จงหาปริมาตรและพื้นที่ผิวทั้งหมดของพีระมิดที่สูง 6 เซนติเมตร ฐานเปนรูปสี่เหลี่ยมจัตุรัส ยาว
ดานละ 16 เซนติเมตร
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2. จงหาพื้นที่ผิวเอียงของพีระมิดฐานรูปหกเหลี่ยมดานเทา มุมเทา ยาวดานละ 4 เซนติเมตร สูงเอียง
7.5 เซนติเมตร
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