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 (C)</p> Signup and view all the answers

What is the formula for the circumference of a circle?

<p>C = 2Ï€r (C)</p> Signup and view all the answers

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

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

What is the formula for the area of a sector?

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

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

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

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

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

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

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

What is the formula for the perimeter of a square?

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

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

<p>Trapezium (A)</p> Signup and view all the answers

What is the formula for the area of a parallelogram?

<p>A = b * h (B)</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 (C)</p> Signup and view all the answers

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

<p>Triangle (D)</p> Signup and view all the answers

What is the formula for the area of a circle?

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

What is the formula for the area of a trapezium?

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

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

<p>Circle (A)</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 (D)</p> Signup and view all the answers

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

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

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

<p>Equilateral triangle (D)</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 (C)</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 (B)</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 (A)</p> Signup and view all the answers

What is the formula for the area of a trapezium?

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

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

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

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

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

What is the name of a polygon with three sides?

<p>Triangle (B)</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 (C)</p> Signup and view all the answers

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