Page 23 - Engineering
P. 23
ﺍﳍﻨﺪﺳﺔ )ﺍﳉﺰء ﺍﻷﻭﻝ( ١٠
اﻟﺰاوﻳﺔ اﻟﻤﻨﻔﺮﺟﺔ ) :(obtuse angleﻫﻲ اﻟﺰاوﻳﺔ اﻟﱵ ﻳﺰﻳﺪ ﻗﻴﺎﺳﻬﺎ ﻋﻦ .90°
اﻟﺰاوﻳﺘﺎن اﻟﻤﺘﺘﺎﻣﺘﺎن ) :(complementary anglesﻳﻘﺎل ﻋﻦ زاوﻳﺘﲔ أﻤﺎ ﻣﺘﺘﺎﻣﺘﺎن
إذاﻛﺎن ﳎﻤﻮع ﻗﻴﺎﺳﻴﻬﻤﺎ ﻳﺴﺎوي .90°
60°
30°
اﻟﺰاوﻳﺔ اﻟﻤﺴﺘﻘﻴﻤﺔ ) :(straight line angleﻫﻲ اﻟﺰاوﻳﺔ اﻟﱵ ﻗﻴﺎﺳﻬﺎ .180°
اﻟﺰاوﻳﺘﺎن اﻟﻤﺘﻜﺎﻣﻠﺘﺎن ) :(supplementary anglesﺗﺴﻤﻰ اﻟﺰاوﻳﺘﺎن ﻣﺘﻜﺎﻣﻠﺘﲔ ﻣﱴ
ﻣﺎ ﻛﺎن ﳎﻤﻮع ﻗﻴﺎﺳﻴﻬﻤﺎ ﻳﺴﺎوي .180°
60° 120°
اﻟﺰاوﻳﺘﺎن اﻟﻤﺘﺠﺎورﺗﺎن ) :(adjacent anglesﳘﺎ زاوﻳﺘﺎن ﰲ اﳌﺴﺘﻮى ﺗﺸﱰﻛﺎن ﰲ
ﺿﻠﻊ وﻟﻜﻨﻬﻤﺎ ﻻ ﺗﺸﱰﻛﺎن ﺑﻨﻘﺎط داﺧﻠﻴﺔ.
D
yC
x
AB
xو yزاوﻳﺘﺎن ﻣﺘﺠﺎورﺗﺎن وﻳﺴﻤﻰﻛﻞ ﻣﻦ اﻟﻀﻠﻌﲔ ADو ABﺿﻠﻌﺎً ﺧﺎرﺟﻴﺎً.