Geometry For Entertainment

Editor's Preface
Translator's Preface
Geometry In The Open Air
	Geometry In The Forest
		By the Length of the Shadow
		Two More Methods
		The Method of Jules Verne
		How Sergeant Popov Acted
		Using a Notebook
		Without Approaching the Tree
		Forest Rangers' Altimeter
		Using a Mirror
		Two Pines
		The Shape of the Tree Trunk
		Universal Formula
		Volume and Weight of a Tree at the Root
		Leaf Geometry
		Six-legged Heroes
	Geometry By The River
		Measuring the Width of the River
		Using a Visor
		The Length Of An Island
		A Pedestrian On the Opposite Bank
		Simple Rangefinders
		The Energy of the River
		The Flow Rate
		How Much Water Flows in The River?
		Water Wheel
		Rainbow Film
		Circles on the Water
		Fantastic Shrapnel
		The Keel Wave
		Speed of Projectiles
		Finding Pond Depth
		Starry Sky in the River
		Path Across the River
		To Construct Two Bridges
	Geometry In The Open Field
		Visible Sizes of the Moon
		Angle of View
		Plate and Moon
		Moon and Copper Coins
		Sensational Photographs
		Reservoir Set Decoration
		Living Protractor
		Jacob's Staff
		Rake Angle Gauge
		Artilleryman's Angle
		Your Visual Acuity
		The Limiting Minute
		The Moon and Stars at the Horizon
		The length of the Moon's Shadow
		How High is the Cloud Above the Ground?
		Tower Height from Photograph
		Exercises
	Geometry on the Road
		The Art of Measuring by Steps
		Eye-meter
		Slopes
		Heap of Gravel
		The Proud Hill
		At a Road Curve
		Radius of Curvature
		The Bottom of the Ocean
		Do Water Mountains Exist?
	Field Trigonometry Without Formulas and Tables
		Calculation of the Sine
		Extraction of the Square Root
		To Find an Angle From its Sine
		Height of the Sun Problem
		Distance to the Island Problem
		Lake Width Problem
		Triangle Area Problem
		Determining the Magnitude of an Angle Without Any Instruments
	Where Heaven and Earth Converge
		Horizon
		Ship on the Horizon
		The Distance to the Horizon
		Gogol's Tower Problem
		Pushkin's Hill
		Where the Rails Meet
		Lighthouse Problems
		Lightning Problem
		Sailboat Problem
		Horizon on the Moon
		In the Lunar Crater
		On Jupiter
	The Geometry Of The Robinsons
		The Geometry of the Starry Sky
		The Latitude of the `Mysterious Island'
		Determining Geographic Longitude
Between Seriousness And Joke In Geometry
	Geometry In The Dark
		Into the Depths of the Hold
		Measuring the Barrel
		Measuring Ruler (The Mayne-Reid Problem)
		What Needed to be Done
		Verification of the Calculation
		The Night Journey of Mark Twain
		Mysterious Circumnavigation
		Measuring with Bare Hands
		Straight Angle in the Dark
	Old And New About The Circle
		Practical Geometry of the Egyptians and Romans
		``I know this and I remember it perfectly.''
		Jack London's Error
		Dropping a Needle
		Straightening a Circle Problem
		Squaring the Circle
		Triangle of Bing
		Head or Feet
		Wire Along the Equator Problem
		Facts and Calculations
		The Girl on the Tightrope
		The Path Through the Pole
		For the Drive Belt
		The Raven's Cleverness
	Geometry Without Measurements And Calculations
		Building Without a Compass
		Centre of Gravity of a Plate
		Napoleon's Task
		Simple Trisector
		Clock Trisector
		Dividing a Circle
		Billiard Ball Problem
		The ``Smart'' Ball
		In One Stroke
		The Seven Bridges of Königsberg
		Geometrical Joke
		Form Verification Problem
		Game
	Big And Small In Geometry
		In a Thimble
		Volume and Pressure
		Thinner than a Spider Web but Stronger than Steel
		Two Jars
		Gigantic Cigarette
		Ostrich Egg Task
		Elephant Bird Egg
		Eggs of Russian Birds
		Weight of the Eggshell
		The Sizes of Our Coins
		Coin Worth a Million Roubles
		Visual Representations
		Our Normal Weight
		Gulliver's Geometry
		Why Does Dust and Clouds Float in the Air?
	Geometric Economy
		How Did Pahom Buy Land
		The Problem of Leo Tolstoy
		Trapezoid or Rectangle
		The Remarkable Property of a Square
		Plots of Different Shapes
		Figures with the Greatest Area
		Nails
		Body of Greatest Volume
		Product of Equal Factors
		Triangle with the Greatest Area
		The Heaviest Beam
		From a Cardboard Triangle
		The Tinsmith's Dilemma
		The Turner's Dilemma
		How to Lengthen a Board?
		The Shortest Path