human
Find the area of non-rectilinear shapes by counting squares, where all squares are either whole or exactly half-squares Each square is \( 1 \mathrm{~cm} \) by \( 1 \mathrm{~cm} \)

What is the area of this shape? ![A 6 by 5 centimetre squared grid. A purple right angled triangle is drawn on the grid with a base of 3cm and a perpendicular height of 3cm.]() \( 9 \mathrm{~cm}^{2} \)
gpt
Does not divide by 2 when calculating the area of a triangle