Classify Two-Dimensional Figures

• acute, scalene

• acute, isosceles

• obtuse, scalene

• obtuse, isosceles

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5.GR.1.1

• Yes

• No

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5.GR.1.1

Drag and drop all the true statements: ​ ​ ​ ​ (a)   ​ ​ (b)   ​ (c)  

• Equilateral triangles are always acute.

• Isosceles triangles may also be equilateral.

• Right triangles are scalene or isosceles.

• An obtuse triangle does not have acute angles.

• A scalene triangle can be isosceles.

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5.GR.1.1

What is a difference between a parallelogram and a square?

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• All quadrilaterals are rhombuses.

• All quadrilaterals are trapezoids.

• All trapezoids are quadrilaterals.

• Trapezoids and rhombuses both have the same properties.

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5.GR.1.1

Which shape is at the top of the hierarchy shown in the diagram?

• Rectangle

• Square

• Quadrilateral

• Trapezoid

What is a rectangle?

• A four-sided shape with four right angles in which opposite sides are equal in length and parallel

• A three-sided shape with one angle of 90 degrees

• A shape with five sides of equal length

• A six-sided shape with sides of varying lengths

According to the hierarchy in the diagram, which shape is directly below the quadrilateral?

• Square

• Trapezoid

• Rectangle

• Circle

Which shape is at the bottom of the hierarchy shown in the diagram?

• Rectangle

• Square

• Circle

• Trapezoid

What are two-dimensional figures?

• Figures with only one dimension

• Figures with three dimensions

• Figures with only two dimensions, such as length and width

• Figures that can only be drawn on a sphere