Page 58 - Engineering
P. 58
٤٥ ﺍﳌﺴﺘﻘﻴﻤﺎﺕ ﻭﺍﻟﺰﻭﺍﻳﺎ ) (٢٢ﰲ اﻟﺸﻜﻞ اﳌﺮﻓﻖ،
A 255° F
E
)ب( DF AB )أ( C BD = 65°
)د( BDF = ABD B )ج( DE BC
65°
40°
85°
D
C
F ) (٢٣ﰲ اﻟﺸﻜﻞ اﳌﺮﻓﻖ
G 60° 120° D
E A
)ب( AB CD 65°
)د( EF CD
75° 40° B
C
)أ( B = 80°
)ج( DCA = 75°
) (٢٤ﰲ اﻟﺸﻜﻞ اﳌﺮﻓﻖ ،ﻣﺎ ﻗﻴﻤﺔ x − y؟
)د( 40° )ج( 30° )ب( 20° )أ( 0°
x
y
