Berapa panjng ab=.....cm

B.7,5
panjang = 15 cm x 5 cm = 7,5
smga membantu

5 / 5 = ( 5 + x ) / 8
5 ( 5 + x ) = 8 × 5
25 + 5 x = 40
5 x = 40 - 25
5 x = 15
x = 15 / 5
x = 3


jadi , panjang ab = 5 + 3 = 8