Draw a square with the parties of 4 cm. Break it at first into two equal triangles, and then into four. Find in each case of the area of triangles. The 6th class

There are two ways, it is possible through a formula of a rectangular triangle, S=a*b t.e (where and - height, and in - the basis), and it is possible just through the area of a square/2, t.e of S (square) = a^2=4^2=16 S (triangle) =162 (t. to triangles equal) = 8 S (half of a triangle) = 8/2=4 4×4=16 cm of century to 16÷2=8sm. century to 16÷4=4sm. century to
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