8th Grade Math Formulas Quiz

Approved & Edited by ProProfs Editorial Team
The editorial team at ProProfs Quizzes consists of a select group of subject experts, trivia writers, and quiz masters who have authored over 10,000 quizzes taken by more than 100 million users. This team includes our in-house seasoned quiz moderators and subject matter experts. Our editorial experts, spread across the world, are rigorously trained using our comprehensive guidelines to ensure that you receive the highest quality quizzes.
Learn about Our Editorial Process
| By Keith Foster
Keith Foster, Content Moderator
Keith is a seasoned quiz creator with a wealth of experience in crafting engaging and informative quizzes, including notable expertise in personality quizzes that captivate diverse audiences. His passion for quizzing and knack for delivering enjoyable quiz experiences make him a valuable asset to the world of quiz creation at ProProfs.com. Keith loves crafting compelling personality quizzes on various topics.
Quizzes Created: 1112 | Total Attempts: 1,732,193
Questions: 10 | Attempts: 1,414

SettingsSettingsSettings
8th Grade Math Formulas Quiz - Quiz

How many mathematic formulas do you remember? Can you pass this 8th grade math formulas quiz we have here for you? Solving an equation or a math problem is not possible without the use of formulas. But sometimes, it becomes very difficult for students to remember them for a long time. That is why it is important to keep using them or at least revise them from time to time. Here are some questions that will test whether you remember these formulas from grade 8 or not. All the best to you!


Questions and Answers
  • 1. 

    The area for triangle is

    • A.

       b*h

    • B.

       2xb*h

    • C.

       b*h 2/1

    • D.

       b*h 1/2

    Correct Answer
    D.  b*h 1/2
    Explanation
    The correct answer is "b*h 1/2". This is because the formula for finding the area of a triangle is (base * height) / 2.

    Rate this question:

  • 2. 

    Which of these is the Pythagorean Theorem formula?

    • A.

      A2 + b2 = c2

    • B.

      A2 + b2 = c3

    • C.

      A + b2 = c2

    • D.

      A2 + b = c2

    Correct Answer
    A. A2 + b2 = c2
    Explanation
    The Pythagorean Theorem states that in a right-angled triangle, the square of the length of the hypotenuse (the side opposite the right angle) is equal to the sum of the squares of the lengths of the other two sides. Therefore, the correct formula is a^2 + b^2 = c^2, where a and b represent the lengths of the two shorter sides, and c represents the length of the hypotenuse.

    Rate this question:

  • 3. 

    The formula for the volume of the pyramid is

    • A.

      1/3(b+h)h

    • B.

      1/3(b*h)h

    • C.

      1/3(b--h)h

    • D.

      1/4(b*h)h

    Correct Answer
    B. 1/3(b*h)h
    Explanation
    The correct answer is 1/3(b*h)h. This formula is derived from the general formula for the volume of a pyramid, which is 1/3 times the base area times the height. In this case, the base area is represented by b (base length) multiplied by h (base width), and the height of the pyramid is also h. Therefore, the formula becomes 1/3(b*h)h.

    Rate this question:

  • 4. 

    "πr^2h" is the

    • A.

      Volume of cylinder

    • B.

      Volume of cone

    • C.

      Volume of pyramid

    • D.

      None of these

    Correct Answer
    A. Volume of cylinder
    Explanation
    The formula "πr^2h" represents the volume of a cylinder. The letter "r" represents the radius of the base of the cylinder, and "h" represents the height of the cylinder. By multiplying the area of the base (πr^2) by the height, we can calculate the volume of the cylinder.

    Rate this question:

  • 5. 

    What's the formula for the area of the semicircle?

    • A.

      1/4(πr2 )

    • B.

      πr2

    • C.

      1/2(πr2 )

    • D.

      2(πr2 )

    Correct Answer
    C. 1/2(πr2 )
    Explanation
    The formula for the area of a semicircle is given by 1/2(πr^2). This formula is derived by taking half of the formula for the area of a full circle, which is πr^2. Since a semicircle is exactly half of a circle, the area is also halved. Therefore, the correct answer is 1/2(πr^2).

    Rate this question:

  • 6. 

    LWH is the

    • A.

      Height of cuboid

    • B.

      Volume of cuboid

    • C.

      Weight of cuboid

    • D.

      Area of cuboid

    Correct Answer
    B. Volume of cuboid
    Explanation
    The correct answer is "Volume of cuboid". This is because LWH refers to the dimensions of a cuboid, with L representing the length, W representing the width, and H representing the height. When these dimensions are multiplied together, they give the volume of the cuboid.

    Rate this question:

  • 7. 

    How to calculate the perimeter for a square?

    • A.

      S - s - s - s

    • B.

      S + s + s x s

    • C.

      S + s + s

    • D.

      S + s + s + s

    Correct Answer
    D. S + s + s + s
    Explanation
    To calculate the perimeter of a square, we add up all four sides. In the given answer, "s" represents the length of one side of the square. By adding "s" four times, we are essentially adding up all four sides of the square, which gives us the correct perimeter.

    Rate this question:

  • 8. 

    Rotation (90-degree counter-clock)

    • A.

      (x,y) (-y,x)

    • B.

      (x,-y) (-y,x)

    • C.

      (-x,y) (-y,x)

    • D.

      (x,y) (y,x)

    Correct Answer
    A. (x,y) (-y,x)
    Explanation
    The given answer (x,y) (-y,x) represents the result of rotating a point (x,y) 90 degrees counter-clockwise. In this transformation, the x-coordinate of the original point becomes the negation of the y-coordinate, and the y-coordinate becomes the x-coordinate. This can be seen by substituting the values of x and y into the expression (-y,x). Therefore, the answer (x,y) (-y,x) correctly represents the 90-degree counter-clockwise rotation of a point (x,y).

    Rate this question:

  • 9. 

    The formula for the area of rectangle

    • A.

      A = a + b

    • B.

      A = a - b

    • C.

      A = ab

    • D.

      None of these

    Correct Answer
    C. A = ab
    Explanation
    The given options are different formulas for calculating the area of a rectangle. However, the correct formula for the area of a rectangle is A = ab, where 'a' represents the length of one side of the rectangle and 'b' represents the length of the other side. This formula calculates the area by multiplying the length and width of the rectangle. Therefore, the correct answer is A = ab.

    Rate this question:

  • 10. 

    Which of these is the reflection across the y-axis?

    • A.

      (x, -y) --> (-x, y)

    • B.

      (x, y) --> (-x, y)

    • C.

      (-x, y) --> (-x, y)

    • D.

      (x, y) --> (-y, y)

    Correct Answer
    B. (x, y) --> (-x, y)
    Explanation
    The correct answer is (x, y) --> (-x, y) because reflecting a point across the y-axis involves changing the sign of the x-coordinate while keeping the y-coordinate the same. This is exactly what the transformation (x, y) --> (-x, y) does. It flips the point across the y-axis by negating the x-coordinate, while leaving the y-coordinate unchanged.

    Rate this question:

Related Topics

Back to Top Back to top
Advertisement
×

Wait!
Here's an interesting quiz for you.

We have other quizzes matching your interest.