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\nAdler  \nDirections and angles  \nPUBLIC LIBRARY  \nFORT WAYNE AND ALLEN COUNTY,IND.  \nAOW38 LON 00  \nCARDS FR口M POCKET  \nнеусоимтривианввау  \n# Directions and Angles\n\nIrving and Ruth Adler  \nIllustrated by Ellen Viereck  \nThe John Day Company  \nNew York  \nThe “Reason Why”Booksby Irving and Ruth Adler  \nAIR  \nATOMS AND MOLECULESCOAL  \nCOMMUNICATIONTHE CALENDAR  \nDIRECTIONS AND ANGLESEVOLUTIONFIBERSHEATHOUSESINSECTS  \nIRRIGATION:CHANGING DESERTS TO GARDENS  \nLEARNING ABOUT STEEL THROUGH THE STORY OF A NAILMACHINESMAGNETS  \nNUMBERS OLD AND NEW  \nNUMERALS:NEW DRESSES FOR OLD NUMBERSOCEANSRIVERSSETSSHADOwSSTORMS  \nTASTE,TOUCH AND SMELLTHE EARTH'S CRUSTTHINGS THAT SPINTREE PRODUCTS  \nWHY?A BOOK OF REASONS  \nWHY AND HOW?A SECOND BOOK OF REASONSYOUR EARSYOUR EYES  \n1969 by Irving Adler  \nAll rights reserved.No part of this book may be reprinted,or repro-duced or utilized in any form or by any electronic,mechanical orother means,now known or hereafter invented,including photo-copying and recording,or in any information storage and retrievalsystem,without permission in writing from the Publisher,The JohnDay Company,Inc.,62 West 45th Street,New York,N.Y.10036.Published on the same day in Canada by Longmans Canada Limited.  \nLibrary of Congress Catalogue Card Number:69-10489  \nPRINTED IN THE UNITED STATES OF AMERICA  \nCONTENTS  \nDirections and Angles14944874Opposite Directions6Directions on a Straight Line7Making a Straight Line8Up and Down Where You Are9Directions on a Plane10Directions in Space12Change of Direction14Anglesl6Half Planes18The Interior and Exterior of an Angle18Comparing Angles for Size20Right Angles22Rectangles24Squares25Horizontal Lines and Planes26Angles That Are Not Right Angles28Two Right Angles Together29Greater than Any Angle30Flag Signals32The Measure of an Angle34Angles on the Face of a Clock36Making a Protractor38Using a Protractor40Up and Down at Different Places42The Spinning of the Earth43North,South,East,West44Finding North46  \n# Directions and Angles\n\nWhat is it that is always moving but doesn't go any-where?The answer to this riddle is “a hand of a clock.”A hand of a clock moves by turning around one place,instead of going from one place to another.  \nThere are many things that move by turning.Some,like the turntable of a phonograph,stay in one placewhile they turn.Others,like the wheel of a bicycle,movefrom place to place as they turn.A top turns or spinswhen you unwind its string.The earth also turns,spin-ning like a top.You often tum yourself as you moveabout on the earth.  \nA hand of a clock points in a certain direction.Whenit turns,it changes its direction.The purpose of this bookis to teach you some useful and interesting things aboutdirections and changes of direction.It will explain howwe use an arrow as a picture of a direction and how weuse an angle as a picture of a change of direction.It willexplain the meaning of the directions up,down,north,south,east,and west.It will show you how to compareangles for size.It will explain what a right angle is andhow you can make one.It will also tell you how to makeand use an instrument for measuring angles.  \n# Opposite Directions\n\nIf two people stand back to back,they face in oppositedirections.In the drawing above,an arrow points to thedirection in which each person is facing.Each personuses the word forward for the direction in which he facesand the word backward for the opposite of that direc-tion.The picture shows that what is forward for one per-son may be backward for another person.  \nLeft and right are also opposite directions.In the pic-ture below showing two people back to back,what isleft for one person is right for the other.","cbCaiaM4vKDz8Hzm","https://ap.wps.com/l/cbCaiaM4vKDz8Hzm","pdf",2597141,56,"English","# Directions and Angles\n## Opposite Directions","[{\"question\":\"How does a clock hand move compared with other things that move?\",\"answer\":\"A clock hand moves by turning around one place, changing direction as it turns, rather than going from one place to another.\"},{\"question\":\"Why are arrows and angles used in the book?\",\"answer\":\"Arrows picture a direction, while an angle pictures a change of direction.\"},{\"question\":\"What does the book mean by opposite directions?\",\"answer\":\"When two people stand back to back, each person faces opposite directions, so what is forward for one is backward for the other, and left/right are also reversed.\"}]","Directions and angles - Directions and Angles | PDF",1790655007,141]