exam Maths Puzzle Numerical Ability

Find the perimeter of the polygon, the top measures 21 m, the sides measure
12 m, and the bottom measures 27 m?

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exam Other Question

1. If the lenght of a rectangle is doubled, does the area double? Why or why not?

2. If the height and the base of a triangle are doubled, what happens to the area? Explain. Find the exact value of sin(-π/6).

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