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Jawaban:

BD = √BC² – CD²

= √5² – 4²

= √25 – 16

= √9

= 3 m

AD = √AC² – CD²

= √ 8,5² – 4²

= √ 72,25 – 16

= √ 56,25

= 7,5 m

maka panjang AB

AB = AD + BD

= 7,5 + 3

= 10,5 m

› Teorema Pythagoras

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BD² = BC² – CD²

BD² = 5² – 4²

BD² = ( 5 × 5 ) – ( 4 × 4 )

BD² = 25 – 16

BD² = 9

BD = √9

BD = 3 cm

–––––

AD² = AC² – CD²

AD² = 8,5² – 4²

AD² = ( 8,5 × 8,5 ) – ( 4 × 4 )

AD² = 72,25 – 16

AD² = 56,25

AD = √56,25

AD = 7,5 m

–––––

AB = BD + AD

AB = 3 cm + 7,5 cm

AB = 10,5 m

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