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Diketahui limas segi empat beraturan T.ABCD, denga...

Diketahui limas segi empat beraturan T.ABCD, dengan AB = 8 cm dan luas bidang TAB = 24 begin mathsize 14px style cm squared end style. Volume limas itu adalah ....

Jawaban:

begin mathsize 14px style l u a s space T A B space equals space 1 half. A B. T P space space space space space space space space space space space space 24 space equals space 1 half.8. T P space space space space space space space space space space space space T P equals 6 space cm end style 

begin mathsize 14px style T P equals square root of T P squared minus O P squared end root space space space space space equals square root of 6 squared minus 4 squared end root space space space space space equals square root of 36 minus 16 end root space space space space space equals square root of 20 space space space space space equals 2 square root of 5 space cm Volume equals 1 third. space luas space alas space. space tinggi space space space space space space space space space space space space equals 1 third. space AB. BC space. TO space space space space space space space space space space space space equals 1 third.8.8.2 square root of 5 space space space space space space space space space space space space equals 128 over 3 square root of 5 cm cubed end style 

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