play."

Mould clay to make a sphere. With thread, cut it into two parts of just the same size.

You have cut your sphere into two equal parts. Each is called a hemisphere.

Mould clay to make half an apple on a square tablet.

Think how many things shaped like a hemisphere you can mould and draw.

Mould a square prism of clay. Draw it standing on a square face. Draw it lying on an oblong face.

Think of things shaped like a square prism: things you see out of doors; at home; at school; everywhere you go. Tell what you have seen.

Choose some to draw, mould or paint.

Mould a square prism of clay.

With thread, cut it into two equal parts like those in the picture. Each of these two equal parts is a right tri-prism.

Look at the three oblong faces of your right tri-prism. One face is wider than either of the others. When a right tri-prism is resting on its widest oblong face, it looks like a roof.

What does it look like in other positions?

Show by drawing or painting.

Draw a circle. Fold and cut it into two equal parts. Each is a semicircle.

Place a hemisphere on a book. Raise the book to the level of your eyes. Draw the shape of the hemisphere. You have drawn a semicircle.

What plant is shaped like a hemisphere on a round stem?

Do you see how to draw a row of these shapes, or a border of semicircles?

These pictures show you how to get a square and an oblong from a square prism.

Draw an oblong four inches long and two inches wide. Draw a three-inch square.

Draw an oblong table-cloth with a border of squares in a row.

Lay a row of tablets: first, an oblong; then a square. Draw this border on a paper towel.

One of the drawings on this page is called a right triangle. Can you find it?

Think how you can get a right triangle from a right tri-prism.

Lay tablets of the same shape to make a border across the ends of a rug.

Draw a house with a triangle in the roof.

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