Understanding Quadrilaterals

A polygon with 4 sides is called _________

• TRIANGLE

• PENTAGON

• QUADRILATERAL

• HEXAGON

Answer explanation

A polygon is a two-dimensional geometric figure that has a finite number of sides. The sides of a polygon are made of straight line segments connected to each other end to end. A circle is also a plane figure but it is not considered a polygon, because it is a curved shape and does not have sides or angles.

The sum of the interior angles of a quadrilateral is:

• 360

• 180

• 90

• 720

A regular polygon has all its sides and angles:

• Different

• Unequal

• Equal

• Parallel

Answer explanation

A regular polygon is both ‘equiangular’ and ‘equilateral’. For example, a square has sides of equal length and angles of equal measure.

What is the measure of each interior angle of a regular pentagon?

• 90 degrees
• 120 degrees
• 135 degrees
• 108 degrees

Answer explanation

Which of the following is a property of a parallelogram?

• Only one pair of opposite sides is parallel.

• Both pairs of opposite sides are parallel.

• All sides are unequal.

• Diagonals are perpendicular to each other.

In a rectangle, the diagonals are:

• The diagonals are unequal and do not intersect.
• The diagonals are equal but do not bisect each other.
• The diagonals are perpendicular and of different lengths.
• The diagonals are equal and bisect each other.

A quadrilateral in which one pair of opposite sides is parallel is called:

• Rhombus
• Square
• Rectangle
• Trapezium

Answer explanation

The number of diagonals in a pentagon is:

• 3
• 5
• 10
• 7

Answer explanation

A rhombus is a special type of:

• parallelogram
• square
• rectangle
• trapezoid

If the sum of the interior angles of a polygon is 1440°, how many sides does the polygon have?

• 8
• 12
• 6
• 10