
Sfide su Cerchi e Algebra
Authored by Stefania Sotira
Mathematics
7th Grade
Used 1+ times

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27 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Calcola l'area di un cerchio con raggio 5 cm.
15π cm²
30 cm²
25π cm²
20π cm²
2.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Qual è la circonferenza di un cerchio con diametro 10 cm?
20.00 cm
31.42 cm
15.70 cm
25.12 cm
3.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Quanto vale x nella seguente equazione?
2x + 3 = 11.
4
5
2
3
4.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Semplifica: 3x+2x−x
4x
4
5x
3x
5.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Semplifica l'espressione: (3a + 2a)2.
5a2
25a
25a2
5a
6.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Qual è l'area di un cerchio con raggio 3 m?
12.56 m²
18.84 m²
31.42 m²
28.27 m²
7.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Calcola la circonferenza di un cerchio con raggio 4 m.
8π m
4π m
16π m
12 m
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