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ANGLES

ANGLES. Measure of an angle. Degree ( derajat )  … 0 Minute ( menit )  … ‘ Second ( detik )  … “. 1 0 = 60 ’ 1 ’ = 60 ” 1 0 = 3600 ”. 64’ = 60’ + 4’. =1 0 + 4’. = 1 0 4’. Created by ﺟﻴﻄ. Additions and subtractions. 25 0 47’ 43” 12 0 22’ 34”. 14 0 81’. 21’ 79”.

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ANGLES

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  1. ANGLES Measure of an angle Degree (derajat) …0 Minute (menit) …‘ Second (detik) …“ 10 = 60’ 1’ = 60” 10 = 3600” 64’ = 60’ + 4’ =10 + 4’ = 10 4’ Created by ﺟﻴﻄ

  2. Additions and subtractions 250 47’ 43” 120 22’ 34” 140 81’ 21’ 79” __________+ ………… 110 26’ 34” 370 69’ 77” = 380 10’ 17” 45” 30 55’ 45” 150 22’ 19” ________ _ …………… Created by ﺟﻴﻄ

  3. Naming Angles B Angle’s ray (Kali sudut) A  Angle’s ray (kaki sudut) C Vertex (titiksudut) An angle can be named in two ways : 1. One letter  A 2. Three letters  BAC or CAB Created by ﺟﻴﻄ

  4. Clasified of angles Acute angle (sudutlancip) : measure between 0 and 90 Right angle (sudutsiku-siku) : measure 90 Obtuse angle (suduttumpul) : measure between 90 and 180 Straight angle (sudutlurus) : measure 180 Reflex angle (Sudut reflex) : measure between 180 and 360  B acute obtuse  A right  E straight  C  D reflex Created by ﺟﻴﻄ

  5. The relationships of two lines a. Parallel lines (sejajar) b. Intersecting lines (berpotongan) k k  l l c. Coincident lines (berimpit) k l Created by ﺟﻴﻄ

  6. Special pairs of angles 1. Supplementary angles (berpelurus) : are two angles whose measures have the sum 180 D Example M P 1300 500 B C A Q R K L Q and L are supplementary ABD and DBC are supplementary Created by ﺟﻴﻄ

  7. 2. Complementary angles (berpenyiku) : are two angles whose measures have the sum 90 Example D A P 600 P and R are complementary 300 R Q ABD and DBC are complementary C B Created by ﺟﻴﻄ

  8. 3. Vertical angles or opposite (bertolakbelakang) are congruent D A E C B AEB and DEC are vertical angles  AEB = DEC AED and BEC are vertical angles  AED = BEC Created by ﺟﻴﻄ

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