A triangle is a polygon. It is a closed 3-sided shape made up of straight lines. The ‘tri-’ part of the word triangle means three. A triangle has 3 sides and 3 angles. Interior angles are the angles ...
PRESENTER:Pythagoras' theorem sounds a bit complicated, so what is it in a nutshell? PRESENTER:Well, it's actually pretty simple really. PRESENTER:When we have a right-angled triangle and we know the ...
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