Classify Triangles and Quadrilaterals

Which of the following is a defining attribute of an equilateral triangle?

• All angles are 90 degrees.

• All sides are of equal length.

• Two sides are of equal length.

• Each angle is less than 90 degrees.

A rectangle is a type of:

• Triangle

• Quadrilateral

• Pentagon

• Hexagon

Which of the following triangles has one angle that is more than 90 degrees?

• Acute triangle

• Equilateral triangle

• Obtuse triangle

• Isosceles triangle

A square is considered a rectangle because:

• It has four sides.

• It has four right angles.

• It has two pairs of parallel sides.

• All of the above.

Which of the following is NOT a characteristic of a parallelogram?

• Opposite sides are parallel.

• All sides are of equal length.

• Opposite sides are equal in length.

• Opposite angles are equal.

What makes a rhombus different from a square?

• A rhombus does not have four sides.

• A rhombus has sides of different lengths.

• A rhombus does not have four right angles.

• A rhombus cannot have parallel sides.

Which statement is true about an isosceles triangle?

• It has no equal sides.

• It has three equal sides.

• It has at least two equal sides.

• It has one right angle.

A trapezoid is defined by having:

• Four right angles.

• Two pairs of parallel sides.

• At least one pair of parallel sides.

• No parallel sides.

Which of the following is a characteristic of a scalene triangle?

• All sides are of equal length.

• Two sides are of equal length.

• No sides are of equal length.

• It has one obtuse angle.

Why would a quadrilateral NOT be classified as a square?

• It has four sides.

• Not all sides are of equal length.

• It has one pair of parallel sides.

• It has four right angles.