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

What is the formula for the area of a circle?

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

What is the conversion of 1 km to m?

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

What is the formula for the area of a square?

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

What is the formula for the perimeter of a rectangle?

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

What is the formula for the area of a triangle?

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

What is the formula for the perimeter of a rhombus?

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

What is the formula for the area of a kite?

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

What is the formula for the circumference of a circle?

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

What is the formula for the area of a trapezium?

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

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

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

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

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

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

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

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

<p>12Ï€ centimeters (A)</p> Signup and view all the answers

What is the formula for the area of a parallelogram?

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

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

<p>16Ï€ cm (A)</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 (A)</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 (A)</p> Signup and view all the answers

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

<p>24 cm (C)</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 (B)</p> Signup and view all the answers

What is the conversion of 1 km² to cm²?

<p>10,000,000,000 cm² (D)</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 (D)</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 (D)</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 (B)</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 (D)</p> Signup and view all the answers

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

<p>32 cm (D)</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 (D)</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 (A)</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 (B)</p> Signup and view all the answers

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

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

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

<p>32 cm (C)</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 (B)</p> Signup and view all the answers

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

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

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