Sloping Up and Down explores the benefits and uses of the ramp. RobbO and RobbEE learn that a ramp is called an inclined plane. They discover that ramps are used for building stairs and escalators, and were even used as far back as ancient Egypt to build the pyramids.
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Seller: ThriftBooks-Dallas, Dallas, TX, U.S.A.
Library Binding. Condition: Fair. No Jacket. Former library book; Readable copy. Pages may have considerable notes/highlighting. ~ ThriftBooks: Read More, Spend Less. Seller Inventory # G077870419XI5N10
Seller: ThriftBooks-Atlanta, AUSTELL, GA, U.S.A.
Library Binding. Condition: Good. No Jacket. Former library book; Pages can have notes/highlighting. Spine may show signs of wear. ~ ThriftBooks: Read More, Spend Less. Seller Inventory # G077870419XI3N10
Seller: World of Books (was SecondSale), Montgomery, IL, U.S.A.
Condition: Good. Good condition ex-library book with usual library markings and stickers. Seller Inventory # 00087982722