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10 questions from this quiz
None - must learn them all
A=lwA = lwA=lw
Triangle is exactly half
A=12bhA = \frac{1}{2}bhA=21bh
The vertical height
A=bhA = bhA=bh
A=12(a+b)hA = \frac{1}{2}(a + b)hA=21(a+b)h
square metres (m²)
27 cm²
10.5 m²
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