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panjang TV = 30 cm
panjang PQ = 34 cm
panjang PT = 9 cm
Ditanya :
panjang QV
Jawab :
TV = √ PQ² - ( PT- QV )²
«—» TV² = PQ² - ( PT - QV )²
30² = 34² - ( 9 - QV )²
( 9 - QV )² = 34² - 3O²
( 9 - QV) = √ 34² - 30²
( 9 - QV ) = √ 1156 - 900
( 9 - QV ) = √ 256
( 9 - QV ) = 16
QV = 16 - 9
= 7
jadi panjang QV adalah 7 cm