For example
A sail with sides of 3, 4 and 5 metres is a scalene triangle.
In Grade 5
Children measure all three sides of a triangle before giving it a name.
Watch out for
Children often name a triangle by how it looks rather than by measuring. Two sides can look equal and still differ.
Say it at home
Draw a triangle and measure each side to see whether any two match.
Try it together
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