Classifying Quadrilaterals and Triangles

Which statement is true?

• A quadrilateral is always a parallelogram.

• A square is always a parallelogram

• A parallelogram is never a rhombus.

• A trapezoid never has two congruent sides.

Classify this triangle based on its side lengths.

• isosceles

• equilateral

• scalene

What is a polygon?

• a 3-dimensional figure

• a 4-dimensional figure

• a 2-dimensional figure

• a straight line

All quadrilaterals are parallelograms.

• True
• False

Classify this triangle based on its angles.

• acute

• right

• obtuse

Which of the following MUST be true for a triangle to be scalene?

• all 3 sides cannot be congruent
• two sides have to be congruent
• all angle measures are less than 90 degrees
• must have 4 congruent sides and angles

Classify this triangle based on its side lengths and type of angle.

• equalateral, acute

• equilateral, obtuse

• equilateral, right

Which of the following statements supports the fact that an equilateral triangle is also an isosceles triangle?

• They both have at least two congruent sides.

• They are both triangles.

• The sum of all the measures of the angles is 180 degrees.

• All the angles are congruent.

Classify this triangle based on its angles.

• acute

• right

• obtuse

What kind of triangle is this based on its side length?

• equilateral

• scalene

• isoceles