1 8-sinf geom yangi. 1-8-bet. 2015(boshi). p65

1) Teng yonli trapetsiyaning diagonallari teng ekanligini isbot qiling.

2 ) Teng yonli trapetsiyaning balandligi yon tomonidan ikki marta kichik. Shu trapetsiyaning burchaklari nimaga teng?

123. 
     Teng yonli trapetsiyaning kichik asosi yon tomoniga teng, diagonali yon to- moniga perpendikular (65- rasm). Uning burchaklarini toping.
     
124. 
     Teng yonli trapetsiyaning qarama-qarshi burchaklari ayirmasi 70° ga teng. Uning burchaklarini toping.
     
125. 
     Teng yonli trapetsiyaning burchaklaridan biri 72° ga teng. Shu tra­petsiyaning qolgan burchaklarini toping.
     
126. 
     Teng yonli trapetsiyaning katta tomoni 5,4 dm ga, yon tomoni 2 dm ga va ular orasidagi burchak 60° ga teng. Uning kichik asosini toping.
     
127. 
     

	11- mavzu.
		TRAPETSIYANING O‘RTA CHIZIG‘I