Page 154 - Engineering
P. 154
ﺍﳌﺜﻠﺜﺎﺕ ١٤١
) (١٨ﰲ اﻟﺸﻜﻞ اﳌﺮﻓﻖ AB CD ،و .EF = 4 ،AB = 6 ،CD EFﻣﺎ
ﻃﻮل CD؟
A
E
C
64
B DF
)أ( ) 12ب( ) 11ج( ) 2د( 9
5 55
) [MAΘ 1990] (١٩ﰲ اﳌﺜﻠﺚ اﻟﻘﺎﺋﻢ اﻟﺰاوﻳﺔ ،AB = 66 ،△ABC
.BC = 77إذا ﻛﺎن ACأﻛﱪ ﻣﻦ 50وﻛﺎن ﻳﺴﺎوي x yﻓﻤﺎ ﻗﻴﻤﺔ
x +y؟
)د( 102 )ج( 96 )ب( 90 )أ( 85
) [MAΘ 1992] (٢٠ﰲ اﻟﺸﻜﻞ اﳌﺮﻓﻖ C ،B ،A ،ACD = 90° ،ﻋﻠﻰ
اﺳﺘﻘﺎﻣﺔ واﺣﺪة .DBC = 45° ،A = 30° ،إذا ﻛﺎن AB = 3 − 3
ﻓﻤﺎ ﻣﺴﺎﺣﺔ اﳌﺜﻠﺚ △BCD؟
D
)د( 7 C 30° )أ( 1
2 )ج( 5 BA 2
2 )ب( 3
2
