Sagot :
3. soru
öncelikle toplam alani bulalim 8×20=160cm²
kesip attigimiz yerdeki dik ucgenlerin alaninj bulalim
[tex] \frac{5 \times 5}{2} \times 2 = 25[/tex]
×2 nerden geldi diye sorarsan ayni ucgenden iki tane var ayrı ayri alanlari bulmak yerine ikiyle çarptim
25 kesip attigim alan 160 toplam alan geriye sadece cikarma islemi kaldi
[tex]160 - 25 = 135[/tex]
kolay gelsin
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