Identifying and Classifying 2D Shapes

equilateral triangle

• a triangle that has no equal sides

• a triangle that has two equal sides

• a triangle that has three equal sides (a regular triangle)

isosceles triangle

• a triangle with at least two congruent sides

• a triangle with all congruent sides

• a triangle with no congruent sides

scalene triangle

• a triangle with at least 2 congruent sides

• a triangle with no congruent sides (all sides are different lengths)

• a triangle with all congruent sides

trapezoid

• a quadrilateral with exactly one pair of parallel sides

• a quadrilateral with exactly two pairs of parallel sides

• a quadrilateral with exactly no pairs of parallel sides

right triangle

• an angle that measures exactly 90 degrees

• an angle that measures less than 90 degrees

• an angle that measures more than 90 degrees

perimeter

• (length x width) the number of square units needed to cover a surface

• (length x width x height) the number of square units needed to fill a 3D shape

• (add up all the sides) the number of units needed to go around a shape

Which figure belongs in the section of the Venn diagram labeled "rhombuses"?

• A

• B

• C

• D

The figures share a characteristic. Which statement best describes these figures?

• They are all trapezoids.

• They are all rectangles.

• They are all squares.

• They are all quadrilaterals.

• A
• B
• C
• D

Which figure does not belong in any section of the Venn Diagram?

• A

• B

• C

• D