Romb va trapetsiyaning yuzi — 8-sinf Geometriya test savollari

1.Rombning diagonallaridan biri ikkinchisidan 1,5 marta katta, yuzi esa 27 cm² ga teng. Shu rombning katta diagonalini toping.

• A)9 cm
• B)6 cm
• C)13,5 cm
• D)4,5 cm

2.ABCD rombning ÐBAD = 30°, unga mos balandligi $BP$ = 9 cm ga teng. Rombning yuzini toping.

• A)162 cm²
• B)81 cm²
• C)324 cm²
• D)40,5 cm²

3.Rombning tomoni 20 cm, o'tkir burchagi 30° ga teng. Uning yuzini toping.

• A)200 cm²
• B)400 cm²
• C)100 cm²
• D)346 cm²

4.Trapetsiyaning asoslari 15 cm va 30 cm ga, yuzi 225 cm² ga teng. Shu trapetsiyaning balandligini toping.

• A)10 cm
• B)5 cm
• C)15 cm
• D)7,5 cm

5.Teng yonli trapetsiyaning diagonallari o'zaro perpendikular, balandligi 5 cm ga teng. Trapetsiyaning yuzini toping.

• A)25 cm²
• B)10 cm²
• C)50 cm²
• D)12,5 cm²

6.To'g'ri burchakli ABCD trapetsiyada AB = $BC$ = 18 cm, ÐD = 45° ga teng. Trapetsiyaning yuzini toping.

• A)486 cm²
• B)972 cm²
• C)324 cm²
• D)405 cm²

7.Trapetsiyaning asoslari 16 cm va 12 cm. Diagonallarining kesishish nuqtasidan asoslargacha bo'lgan masofalar 6 cm va 4 cm ga teng. Shu trapetsiyaning yuzini toping.

• A)140 cm²
• B)168 cm²
• C)70 cm²
• D)84 cm²

8.Rombning yuzi 40 cm², balandligi esa 5 cm ga teng. Shu rombning perimetrini toping.

• A)32 cm
• B)8 cm
• C)16 cm
• D)64 cm

9.Rombning diagonallari 24 cm va 15 cm ga teng. Uning yuzini toping.

• A)180 cm²
• B)360 cm²
• C)90 cm²
• D)195 cm²

10.Trapetsiyaning asoslari 11 cm va 18 cm ga, balandligi esa 6 cm ga teng. Uning yuzini toping.

• A)87 cm²
• B)174 cm²
• C)29 cm²
• D)43,5 cm²