Derive and apply triangle area — page 1
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Practice question

  1. A right-triangular sign has perpendicular sides 9 cm and 6 cm. Two identical signs are cut from a sheet. Find their combined area and explain why you can use a rectangle or parallelogram to check.

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Common Core connections

Source labels: 6.G.A.1. Review the learning goals below to check the fit for your class.

  • 6.G.A.1 — Area of triangles and polygons

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