MA.3.GR.1.1, MA.3.GR.1.2, & MA.3.GR.1.3

What is a line segment?

• A part of a line that has two endpoints

• A line that goes on forever in both directions

• A line that has only one endpoint

• A line that curves

Answer explanation

A line segment is defined as a part of a line that has two endpoints, distinguishing it from a line that extends infinitely in both directions or has only one endpoint.

Which of the following is a quadrilateral?

• Triangle

• Circle

• Rectangle

• Pentagon

Answer explanation

A quadrilateral is a polygon with four sides. Among the options, a rectangle has four sides, making it a quadrilateral. A triangle has three sides, a circle has no sides, and a pentagon has five sides.

Which shape has only one line of symmetry?

• Circle

• Square

• Rectangle

• Trapezoid

Answer explanation

A trapezoid has only one line of symmetry, which divides it into two mirror-image halves. In contrast, a circle, square, and rectangle have multiple lines of symmetry.

What do you call lines that never meet and are always the same distance apart?

• Intersecting lines

• Perpendicular lines

• Parallel lines

• Curved lines

Answer explanation

Lines that never meet and are always the same distance apart are called parallel lines. They maintain a constant distance from each other, unlike intersecting or perpendicular lines, which either cross or meet at right angles.

Which of the following is a defining attribute of a rhombus?

• Four right angles

• Four equal sides

• Two pairs of parallel sides

• One pair of parallel sides

Answer explanation

A rhombus is defined by having four equal sides. While it also has two pairs of parallel sides, the key attribute that distinguishes it is the equality of all sides, making 'four equal sides' the correct choice.

Which of the following figures is line-symmetric?

• Scalene triangle

• Isosceles triangle

• Parallelogram

• Trapezoid

Answer explanation

An isosceles triangle has at least one line of symmetry, which divides it into two equal halves. In contrast, a scalene triangle has no lines of symmetry, while a parallelogram and trapezoid have limited symmetry. Thus, the isosceles triangle is the correct choice.

What is a ray?

• A line with two endpoints

• A line that goes on forever in one direction

• A line that goes on forever in both directions

• A line that curves

Answer explanation

A ray is defined as a line that starts at a point and extends infinitely in one direction. This distinguishes it from a line segment, which has two endpoints, and a line, which extends in both directions.

Which quadrilateral has only one pair of parallel sides?

• Square

• Rectangle

• Trapezoid

• Rhombus

Answer explanation

A trapezoid is defined as a quadrilateral with only one pair of parallel sides, distinguishing it from squares, rectangles, and rhombuses, which all have two pairs of parallel sides.

How many lines of symmetry does a square have?

• 1

• 2

• 3

• 4

Answer explanation

A square has 4 lines of symmetry: two diagonals and two lines that bisect the square horizontally and vertically. This means it can be folded along these lines and both halves will match perfectly.

What do you call lines that cross each other?

• Parallel lines

• Perpendicular lines

• Intersecting lines

• Curved lines

Answer explanation

Lines that cross each other are called intersecting lines. Unlike parallel lines, which never meet, or perpendicular lines, which intersect at right angles, intersecting lines can cross at any angle.