15. Tomonlari teng bo’lgan parallelogram … deb ataladi. A) romb B) kvadrat C) to’g’ri to’rtburchak D) aylana 16. Tenglamalar sistemasini yeching; A) x=2; y=1 B) x=1; y=3 C) x=0; y=3 D) x=3; y=1 17. Tomonlari teng bo’lgan to’g’ri to’rtburchak … deb ataladi. A) kvadrat B) romb C) doira D) parallelogram 18. Tomoni 10 sm bo’lgan rombning perimetrini ayting. A) 30 sm B) 20 sm C) 40 sm D) 50 sm 19. To’g’ri burchakli trapetsiyaning to’g’ri burchagi necha gradusga teng. A) 1400 B) 1200 C) 1500 D) 900 20. Kvadratning tomoni 8 sm uning yuzini toping. A) 32 sm2 B) 64 sm2 C) 16 sm2 D) 20 sm2 21. y=kx funksiyaga misol keltiring. 22. Tenglamalar sistemasiga misol keltiring. 23. To’g’ri to’rtburchak perimetri formulasi.. 24. Kvadrat perimetri formulasi.. 25. Chiziqli funksiyani yozing.