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BronaGrand Large Triangle Ruler Square Set, 30/60 and 45/90 Degrees, Set of 2 - Walmart.ca
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ClosetMaid #21066 12" Shelf & Rod Corner Shelf Kit White Steel - Combo Ship | eBay
A triangle and a parallelogram have the same base and the same area. If the sides of the triangle are 26cm, 28cm, and 30cm, and the parallelogram stands on the base 28cm,
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Area of a Triangle Worksheet | Fourth Grade Math Resource