To'g'ri to'rtburchak va parallelogrammning yuzi — 8-sinf Geometriya test savollari

1.To'g'ri to'rtburchakning yuzi 150 cm² ga, tomonlarining nisbati esa 3:2 kabi. Shu to'g'ri to'rtburchakning perimetrini toping.

• A)50 cm
• B)25 cm
• C)60 cm
• D)100 cm

2.Parallelogrammning tomonlari 25 cm va 20 cm, birinchi tomoniga tushirilgan balandlik 8 cm ga teng. Shu parallelogrammning ikkinchi tomoniga tushirilgan balandligini toping.

• A)10 cm
• B)8 cm
• C)12,5 cm
• D)6,4 cm

3.ABCD parallelogrammda AD = 20 cm, BD = 16 cm, ÐBDA = 30°. Parallelogrammning yuzini toping.

• A)160 cm²
• B)80 cm²
• C)320 cm²
• D)277 cm²

4.To'g'ri burchakli uchburchakning katetlari 12 cm va 24 cm. Gipotenuzaning o'rtasidan katetlarga tushirilgan perpendikulyarlar orqali hosil bo'lgan to'g'ri to'rtburchakning yuzini toping.

• A)72 cm²
• B)144 cm²
• C)36 cm²
• D)288 cm²

5.Parallelogrammning yuzi 36 cm², balandliklari 3 cm va 4 cm ga teng. Shu parallelogrammning perimetrini toping.

• A)42 cm
• B)21 cm
• C)84 cm
• D)48 cm

6.Parallelogrammning tomonlari 20 cm va 28 cm, ular orasidagi burchak 30° ga teng. Parallelogrammning yuzini toping.

• A)280 cm²
• B)560 cm²
• C)140 cm²
• D)485 cm²

7.To'g'ri to'rtburchakning tomonlari 2,5 dm va 12 cm ga teng. Uning yuzini toping.

• A)300 cm²
• B)37 cm²
• C)150 cm²
• D)60 cm²

8.To'g'ri to'rtburchakning tomonlari 24 cm va 20 cm ga teng. Uning yuzini toping.

• A)480 cm²
• B)44 cm²
• C)88 cm²
• D)240 cm²

9.To'g'ri to'rtburchakning bir tomoni 15 dm, ikkinchi tomoni esa undan 5 marta ortiq. Uning yuzini dm² da toping.

• A)1125 dm²
• B)90 dm²
• C)1350 dm²
• D)225 dm²

10.Parallelogrammning asosi 10 cm, unga tushirilgan balandligi 0,5 m ga teng. Parallelogrammning yuzini cm² da toping.

• A)500 cm²
• B)5 cm²
• C)50 cm²
• D)100 cm²