
Rúmfræðiæfing 25
Authored by Gauti Marinósson
Mathematics
9th Grade
Used 1+ times

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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hvað er flatarmál rétthyrnings með lengd 5 cm og breidd 3 cm?
15 cm²
12 cm²
20 cm²
10 cm²
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Reiknaðu ummál hring með radíus 4 cm.
10π cm
8π cm
12π cm
6π cm
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hvert er flatarmál þríhyrnings með grunnlínuna 6 cm og hæðina 4 cm?
12 cm²
8 cm²
14 cm²
10 cm²
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hvernig reiknarðu ummál rétthyrnings?
Ummál = lengd + breidd
Ummál = 2 * (lengd + breidd)
Ummál = lengd * breidd
Ummál = 4 * lengd
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hver er hæðin á þríhyrningi ef grunnhliðin er 10 cm og flatarmálið er 30 cm?
6 cm
4 cm
10 cm
8 cm
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Reiknaðu flatarmál ferhyrnings með hliðarlengdum 8 cm og 2 cm.
20 cm²
10 cm²
32 cm²
16 cm²
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Hvert er ummál ferhyrnings með hliðarlengdum 7 cm og 5 cm?
20 cm
24 cm
30 cm
18 cm
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