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Understanding Quadrilaterals

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Polygons and their Classification

Subtopic

Polygons and their Classification under Understanding Quadrilaterals for Grade 8 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of the following is a simple curve?

    A.

    A curve that crosses itself

    B.

    A curve that does not cross itself

    C.

    A figure made of curved lines only

    D.

    A figure that is always open

  2. 2.

    Which of the following describes a concave quadrilateral?

    A.

    All angles are equal

    B.

    One interior angle is greater than 180∘180^\circ

    C.

    Both diagonals lie inside

    D.

    All sides are equal

  3. 3.

    The sum of interior angles of a decagon is:

    A.

    1260∘1260^\circ

    B.

    1440∘1440^\circ

    C.

    1620∘1620^\circ

    D.

    1800∘1800^\circ

Download the worksheet for Understanding Quadrilaterals - Polygons and their Classification to practice offline. It includes additional chapter-level practice questions.

Angle Sum Property

Subtopic

Angle Sum Property under Understanding Quadrilaterals for Grade 8 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    If three angles of a quadrilateral are 110∘,50∘,110^\circ, 50^\circ, and 40∘40^\circ, find the measure of the fourth angle.

    A.

    150∘150^\circ

    B.

    160∘160^\circ

    C.

    140∘140^\circ

    D.

    170∘170^\circ

  2. 2.

    In a quadrilateral, if the angles are x,x+5,x+10,x, x+5, x+10, and x+15x+15 degrees, find the value of xx.

    A.

    80.5∘80.5^\circ

    B.

    81.5∘81.5^\circ

    C.

    82.5∘82.5^\circ

    D.

    83.5∘83.5^\circ

  3. 3.

    If the angles of a quadrilateral are x,3x,100∘,x, 3x, 100^\circ, and 60∘60^\circ, find the value of xx.

    A.

    40∘40^\circ

    B.

    50∘50^\circ

    C.

    60∘60^\circ

    D.

    70∘70^\circ

Download the worksheet for Understanding Quadrilaterals - Angle Sum Property to practice offline. It includes additional chapter-level practice questions.

Types of Quadrilaterals

Subtopic

Types of Quadrilaterals under Understanding Quadrilaterals for Grade 8 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which of the following is NOT a property of a rhombus?

    A.

    All sides are equal

    B.

    Diagonals bisect each other

    C.

    Opposite angles are equal

    D.

    All angles must be 90∘90^\circ

  2. 2.

    If the measure of three angles of a quadrilateral are each 90∘90^\circ, then the fourth angle is:

    A.

    30∘30^\circ

    B.

    60∘60^\circ

    C.

    90∘90^\circ

    D.

    120∘120^\circ

  3. 3.

    Which quadrilateral is formed by four line segments where opposite sides are parallel and all angles are 90∘90^\circ?

    A.

    Trapezium

    B.

    Kite

    C.

    Rectangle

    D.

    Rhombus

Download the worksheet for Understanding Quadrilaterals - Types of Quadrilaterals to practice offline. It includes additional chapter-level practice questions.

Properties of a Parallelogram

Subtopic

Properties of a Parallelogram under Understanding Quadrilaterals for Grade 8 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    In parallelogram PQRSPQRS, if ∠P=85∘\angle P = 85^\circ, what is the sum of ∠Q\angle Q and ∠S\angle S?

    A.

    170∘170^\circ

    B.

    190∘190^\circ

    C.

    95∘95^\circ

    D.

    180∘180^\circ

  2. 2.

    If two adjacent sides of a parallelogram are equal, the parallelogram is best described as a:

    A.

    Rectangle

    B.

    Trapezium

    C.

    Rhombus

    D.

    Kite

  3. 3.

    In a parallelogram, if the base is 88 cm and the height is 55 cm, what is the sum of the lengths of the two parallel bases?

    A.

    1010 cm

    B.

    1313 cm

    C.

    1616 cm

    D.

    4040 cm

Download the worksheet for Understanding Quadrilaterals - Properties of a Parallelogram to practice offline. It includes additional chapter-level practice questions.

Special Parallelograms (Rhombus, Rectangle, Square)

Subtopic

Special Parallelograms (Rhombus, Rectangle, Square) under Understanding Quadrilaterals for Grade 8 CBSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    Which shape has all the properties of a parallelogram, a rhombus, and a rectangle?

    A.

    Square

    B.

    Trapezium

    C.

    Kite

    D.

    None of these

  2. 2.

    In a rectangle PQRSPQRS, the diagonals PRPR and QSQS intersect at MM. If PM=4PM = 4 cm, find the length of QSQS.

    A.

    44 cm

    B.

    88 cm

    C.

    1212 cm

    D.

    1616 cm

  3. 3.

    A rhombus with all interior angles equal to 90∘90^\circ is a:

    A.

    Rectangle

    B.

    Square

    C.

    Trapezium

    D.

    Parallelogram

Download the worksheet for Understanding Quadrilaterals - Special Parallelograms (Rhombus, Rectangle, Square) to practice offline. It includes additional chapter-level practice questions.