Attributes of Shapes

Triangles and Quadrilaterals

Triangles

A triangle is a close shape with 3 straight sides

Triangles can be classified by their sides or their angles

• Angles: acute, obtuse, and right

• Sides: equilateral, isosceles, scalene

Quadrilaterals

A quadrilateral is a closed shape with 4 straight sides. There are several sub-categories that fall under the quadrilateral umbrella.

Quadrilaterals can be broken down further based on their parallel sides.

• Quadrilaterals with 2 pairs of parallel lines are called PARALLELOGRAMS

• Quadrilaterals with one pair of parallel lines are called TRAPEZOIDS

Parallelograms can also be broken down further based on their sides and angles.

• Parallelograms with 4 right angles are called RECTANGLES

• Parallelograms with 4 congruent sides are called RHOMBUSES

Squares

Squares are parallelograms that have 4 congruent sides AND 4 right angles.

Multiple Choice

What kind of triangle is shown?

• equilaterial

• scalene

• isosceles

Multiple Choice

What shape is show?

• quadrilateral

• parallelogram

• trapezoid

Multiple Choice

What kind of triangle is shown?

• obtuse

• acute

• right

Multiple Choice

What shape is shown?

• rhombus

• square

• rectangle

Multiple Choice

What kind of triangle is shown?

• equilateral

• isosceles

• scalene

Multiple Choice

What shape is shown?

• quadrilateral

• trapezoid

• parallelogram