Gr 9 MATH: Ch 9.1 Classifying 2D shapes
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Questions and Answers

What is the sum of interior angles of a triangle?

  • 210°
  • 180° (correct)
  • 240°
  • 150°

    • What is the name of a polygon with all sides and angles equal?

  • Regular Polygon (correct)
  • Equilateral Polygon
  • Isosceles Polygon
  • Irregular Polygon

    • What is the formula for the area of a rectangle?

  • A = s^2
  • A = b × h
  • A = 2(l + w)
  • A = l × w (correct)

    • What is the name of a quadrilateral with opposite sides equal and parallel, opposite angles equal?

    <p>Parallelogram</p> Signup and view all the answers

    What is the formula for the circumference of a circle?

    <p>C = 2πr</p> Signup and view all the answers

    What is the name of a triangle with one angle 90°?

    <p>Right Triangle</p> Signup and view all the answers

    What is the formula for the area of a sector?

    <p>A = (θ/360) × πr^2</p> Signup and view all the answers

    What is the name of a polygon with sides and angles not all equal?

    <p>Irregular Polygon</p> Signup and view all the answers

    What is a common property of a square and a rhombus?

    <p>All sides are equal</p> Signup and view all the answers

    What is the name of a triangle with two sides and two angles equal?

    <p>Isosceles triangle</p> Signup and view all the answers

    What is the formula for the perimeter of a square?

    <p>P = 4s</p> Signup and view all the answers

    What is the name of a quadrilateral with only one pair of opposite sides parallel?

    <p>Trapezium</p> Signup and view all the answers

    What is the formula for the area of a parallelogram?

    <p>A = b * h</p> Signup and view all the answers

    What is a common property of a circle and a sector?

    <p>All points are equidistant from the center</p> Signup and view all the answers

    What is the name of a polygon with three sides and three angles?

    <p>Triangle</p> Signup and view all the answers

    What is the formula for the area of a circle?

    <p>A = * r^2</p> Signup and view all the answers

    What is the primary characteristic that distinguishes a regular polygon from an irregular polygon?

    <p>Equality of sides and angles</p> Signup and view all the answers

    Which of the following statements is true about a scalene triangle?

    <p>It has all sides and angles different</p> Signup and view all the answers

    What is the formula for the area of a trapezium?

    <p>A = (a + b) × h</p> Signup and view all the answers

    What is the primary characteristic that distinguishes a parallelogram from a rectangle?

    <p>All angles are right angles</p> Signup and view all the answers

    Which of the following shapes is a sector a portion of?

    <p>Circle</p> Signup and view all the answers

    What is the Pythagorean Theorem used for?

    <p>Finding the length of the hypotenuse of a right triangle</p> Signup and view all the answers

    What is the primary characteristic that distinguishes a rhombus from a rectangle?

    <p>All sides are equal</p> Signup and view all the answers

    Which of the following shapes has an equal number of sides and angles?

    <p>Equilateral triangle</p> Signup and view all the answers

    What is the necessary condition for a quadrilateral to be a rectangle?

    <p>Opposite sides are equal and parallel</p> Signup and view all the answers

    What is the characteristic that distinguishes a sector from a circle?

    <p>It is a portion of a circle</p> Signup and view all the answers

    What is the name of a polygon with all sides of equal length, but not all angles equal?

    <p>Rhombus</p> Signup and view all the answers

    What is the formula for the area of a trapezium?

    <p>$A = \frac{1}{2} \times (a + b) \times h$</p> Signup and view all the answers

    What is the necessary condition for a triangle to be isosceles?

    <p>Two sides are equal</p> Signup and view all the answers

    What is the common property of a circle and a square?

    <p>All sides are equal</p> Signup and view all the answers

    What is the name of a polygon with three sides?

    <p>Triangle</p> Signup and view all the answers

    What is the primary characteristic that distinguishes an equilateral triangle from an isosceles triangle?

    <p>Number of equal sides</p> Signup and view all the answers

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