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aronandalp3yep6
05.01.2021 •
Mathematics
Perimetre şi arii_test - VII
1.Calculaţi(în cm2 ) :
a)Aria unui paralelogram cu baza de 20 cm şi înălţimea de 0,5dm .
b)Aria unui triunghi dreptunghic cu lungimile catetelor de 6 cm şi 0,8 dm.
c)Aria unui romb cu diagonalele de 12cm şi 16 cm.
d) Aria unui dreptunghi cu lăţimea de 5 cm şi lungimea egală cu triplul lăţimii.
e)Aria unui trapez dreptunghic cu baza mică de 10 cm,baza mare de 0,12 m şi latura perpendiculară pe baze de 2 cm.
f) Aria unui trapez cu înălţimea de 0,6m şi suma bazelor de 200cm.
17p 2) Suma dintre lăţimea şi lungimea unui dreptunghi este 134 cm ,iar dacă împărţim lungimea la lăţime, obţinem câtul 5 şi restul 14.Aflaţi aria dreptunghiului.
25p 3)Trapezul dreptunghic ABCD are AB||CD, AB
a)Realizaţi desenul
b)Calculaţi CD;
c)Calculaţi aria trapezului ABCD;
d)Calculaţi aria triunghiului BAD.
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Ответ:
The answer to your question is there are 440 students
Step-by-step explanation:
Data
110 girls = 25% of the total students
The Total number of students = ?
Use a rule of three to solve this problem
110 girls 25%
x 100%
x = (100 x 110) / 25
x = 440 students