Page 60 - Engineering
P. 60
٤٧ ﺍﳌﺴﺘﻘﻴﻤﺎﺕ ﻭﺍﻟﺰﻭﺍﻳﺎ
)ب( ɵz + uɵ + ɵv = 90° ) (٢٨ﰲ اﻟﺸﻜﻞ اﳌﺮﻓﻖ:
)د( ɵy − ɵx = ɵt − ɵz )أ( ɵy = ɵv
)ج( xɵ + ɵy + ɵz + ɵt = 180°
y° x°
u° v° z° t°
)ب( xɵ = 55° ) (٢٩ﰲ اﻟﺸﻜﻞ اﳌﺮﻓﻖ:
)د( ɵx + ɵy = 90° )أ( xɵ = 60°
)ج( AB EF
E 115° y° F
A B
80°
15°
x° 150°
C D
) (٣٠ﰲ اﻟﺸﻜﻞ اﳌﺮﻓﻖ ﻗﻴﻤﺔ x + y − zﻳﺴﺎوي
)د( 180° )ج( 150° )ب( 120° )أ( 90°
x°
y°
z°
