Four EQUAL SIDES Leo and Pallas are practicing their army drill Watch me says Leo I’ll mark out the perfect square See I take one step in this direction Then I turn smartly and take one in this direction Now I turn smartly again and take one in this direction Then You turn smartly again and come back to the place where you started Pallas shows he understands Good says Leo Now it’s your turn Just 4 moves It’s quite easy But Pallas can make a square without moving at all After all he has four legs one at each corner You’ll never make a soldier says Leo
5 SQUARE A square is a two dimensional or 2-D cshape This means it has length and width A square has 4 sides that are of equal length Its length is the same as its width In mathematics we show that the sides are equal using this sign The Testudo Testudo means tortoise in the Italian language Roman soldiers used their shields to make a kind of shell like a tortoise shell They raised their shields above their heads and held them in front of their bodies The Testudo formation protected them against arrows or objects thrown from defenders on the walls above
6 AT THE CORNER What are you doing asks Pallas Why do you need all this equipment We’re planting says Leo We dig holes We put in sticks We plant the seeds We wait for the plants to grow We asks Pallas Cats don’t plant I need you says Leo The poles have to be joined along the top so the plants can climb up then grow sideways So if you climb up the poles you can tie the string along the top Just tying then says Pallas No digging No putting in poles No planting Just tying string along the top Tightly says Leo You must pull it tight and keep it straight You must keep the string at a right angle to the poles You know what says Pallas You do the planting and I’ll do the waiting I’ll just lie here quietly and wait for the plants to grow
7 SQUARE A square has 4 corners that are the same size The sides of the square meet at an angle known as a right angle The size of an angle is measured in degrees which is written with this sign A right angle has 90
