2D Shapes Vocabulary

A straight path that continues forever in both directions

• line

• line segment

• angle

• parallel line

Which word best describes this figure?

• equilateral triangle

• scalene triangle

• isosceles triangle

• acute triangle

A line that has one endpoint and continues on forever in the other direction

• perpendicular line

• arrow

• line

• ray

Forms a perfect (90 degree) corner

• right angle

• acute angle

• obtuse angle

• right triangle

Which word best describes this figure?

• straight lines

• parallel lines

• parallel lines

• intersecting lines

Forms a straight line

• right angle

• acute angle

• obtuse angle

• straight angle

An exact location in space

• angle

• triangle

• point

• quadrilateral

Less than a right angle (less than 90 degrees)

• right angle

• acute angle

• obtuse angle

• straight angle

Which word best describes this figure

• equiangular triangle

• equilateral triangle

• obtuse triangle

• scalene triangle

A line that has two definite endpoints

• line

• line segment

• ray

• acute angle