Gr 9 MATH: Ch 11.1 Area and Perimeter of 2D shapes
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Questions and Answers

If the length of a rectangle is doubled and the width is tripled, what happens to the area?

  • It is increased by six times (correct)
  • It is doubled
  • It is tripled
  • It is quadrupled

    • What is the conversion of 1 m² to cm²?

  • 100,000 cm²
  • 100 cm²
  • 1000 cm²
  • 10,000 cm² (correct)

    • What is the perimeter of a square with a side length of 4 cm?

  • 20 cm
  • 12 cm
  • 8 cm
  • 16 cm (correct)

    • What is the area of a triangle with a base of 5 cm and a height of 6 cm?

    <p>20 cm²</p> Signup and view all the answers

    What is the formula for the area of a circle?

    <p>A = πr²</p> Signup and view all the answers

    What is the conversion of 1 km to m?

    <p>1000 m</p> Signup and view all the answers

    What is the formula for the area of a square?

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

    What is the formula for the perimeter of a rectangle?

    <p>P = 2(l + w)</p> Signup and view all the answers

    What is the formula for the area of a triangle?

    <p>A = (1/2) * base * height</p> Signup and view all the answers

    What is the formula for the perimeter of a rhombus?

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

    What is the formula for the area of a kite?

    <p>A = (1/2) * d1 * d2</p> Signup and view all the answers

    What is the formula for the circumference of a circle?

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

    What happens to the perimeter of a shape when one dimension is doubled?

    <p>The perimeter is doubled</p> Signup and view all the answers

    What is the formula for the area of a trapezium?

    <p>A = (1/2) * (side1 + side2) * height</p> Signup and view all the answers

    If the area of a rectangle is 12 square meters, and its length is doubled, what is the new area?

    <p>48 square meters</p> Signup and view all the answers

    What is the relationship between the diameter and radius of a circle?

    <p>d = 2r</p> Signup and view all the answers

    If a square has a perimeter of 12 centimeters, what is its area?

    <p>9 square centimeters</p> Signup and view all the answers

    What is the conversion of 1 kilometer squared to meters squared?

    <p>1,000,000 meters squared</p> Signup and view all the answers

    If the base of a triangle is 5 centimeters and the height is 6 centimeters, what is its area?

    <p>20 square centimeters</p> Signup and view all the answers

    What is the circumference of a circle with a radius of 4 centimeters?

    <p>12π centimeters</p> Signup and view all the answers

    What is the formula for the area of a parallelogram?

    <p>A = base × height</p> Signup and view all the answers

    A rectangle has a length of 8 cm and a width of 5 cm. What is its perimeter?

    <p>24 cm</p> Signup and view all the answers

    What is the formula for the area of a kite?

    <p>A = 1/2 × d_1 × d_2</p> Signup and view all the answers

    A triangle has a base of 7 cm and a height of 9 cm. What is its area?

    <p>31.5 cm²</p> Signup and view all the answers

    A circle has a radius of 4 cm. What is its circumference?

    <p>16π cm</p> Signup and view all the answers

    A trapezium has a height of 8 cm, a side_1 of 10 cm, and a side_2 of 12 cm. What is its area?

    <p>80 cm²</p> Signup and view all the answers

    What is the effect on the perimeter of a rectangle when its length is doubled and its width is tripled?

    <p>The perimeter is quadrupled</p> Signup and view all the answers

    A rhombus has a side length of 6 cm. What is its perimeter?

    <p>24 cm</p> Signup and view all the answers

    What is the effect on the area of a rectangle if its length is doubled and its width is halved?

    <p>The area remains the same</p> Signup and view all the answers

    What is the conversion of 1 km² to cm²?

    <p>10,000,000,000 cm²</p> Signup and view all the answers

    If the perimeter of a rectangle is 24 cm, and its length is 8 cm, what is its width?

    <p>4 cm</p> Signup and view all the answers

    What is the area of a parallelogram with a base of 6 cm and a height of 8 cm?

    <p>48 cm²</p> Signup and view all the answers

    If the area of a triangle is 24 cm², and its base is 6 cm, what is its height?

    <p>8 cm</p> Signup and view all the answers

    What is the effect on the perimeter of a rectangle when its length is tripled and its width is halved?

    <p>The perimeter remains the same</p> Signup and view all the answers

    What is the perimeter of a kite with diagonals 8 cm and 12 cm?

    <p>32 cm</p> Signup and view all the answers

    A rectangle has a length of 6 cm and a width of 4 cm. If the length is doubled and the width is tripled, what is the new perimeter?

    <p>42 cm</p> Signup and view all the answers

    A trapezium has a height of 10 cm, a side_1 of 12 cm, and a side_2 of 8 cm. What is its area?

    <p>100 cm²</p> Signup and view all the answers

    What is the area of a composite shape made up of two rectangles with dimensions 4 cm x 6 cm and 3 cm x 5 cm?

    <p>40 cm²</p> Signup and view all the answers

    A circle has a diameter of 10 cm. What is its area?

    <p>50π cm²</p> Signup and view all the answers

    What is the perimeter of a parallelogram with sides 8 cm and 10 cm?

    <p>32 cm</p> Signup and view all the answers

    A square has a side length of 6 cm. If the side length is doubled, what is the new area?

    <p>72 cm²</p> Signup and view all the answers

    What is the area of a rhombus with diagonals 10 cm and 12 cm?

    <p>50 cm²</p> Signup and view all the answers

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