Estimate the area of triangle

Find the missing length.

• 2m

• 20m

• 800m

• 40m

Find the missing length

• 14km

• 4km

• 10km

• 5km

Find the area of the rectangle .

• 28 metre squared

• 7 metre squared

• 24 metre squared

• 12 metre squared

Estimate the area of the green triangle A by counting squares. (Each small blue square is one centimeter square)

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Estimate the area of the purple triangle C by counting squares. (Each small blue square is one centimetre squared)

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This rectangle was formed by putting two squares together. What is the area of the rectangle?

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Here are the bottom three triangles, as they look on a centimetre square grid.

What would be the area of the 10th triangle?

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