A triangle called Isosceles, And his friend who was known as Obtuse, Were arguing over the very best way To cook a Christmas goose. "Let's bake it," the Obtuse one said, "In an open fireplace,...
Meet the triangle family
Every angle has one side that is open. If you close this open side, you'll have a closed shape with three straight sides and three angles. A shape of this kind is called a triangle ang guhl)....
Meet the angle family
People have names. And we give names to different kinds of animals. So why shouldn't angles have names? They do! Angles are named after the kind of corner they make. An angle that forms a square...
Dot-picture shapes.
You've probably made dot pictures lots of times. They're pictures you make by drawing lines from one dot to another. Well, here are some special dot pictures you can make for yourself. Get a paper...
Points and lines
What is this • ? You probably said, "It's a dot." Or maybe you said, "It's a period." Well, it could be a dot or a period. But to mathematicians, it's a picture of a point. You probably think of a...
Shapes everywhere
Just as you live in a world of numbers, you also live in a world of shapes. Your house or apartment is full of shapes. Every corner forms a shape called an angle. Every door and doorway is a shape...
Points, lines, shapes, and designs
Start with two points. Connect them with a line. Then make an angle (You're doing fine). Close the angle And a triangle's there. Put two triangles together ---You've got a square! And squares and...
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