8th Grade Mathematics: Geometry Concepts Quiz

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What is the name of the point where the three medians of a triangle intersect?

Orthocenter

Circumcenter

Centroid (correct)

Incenter

Which theorem states that in a right-angled triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides?

Pythagorean Theorem (correct)

Converse of Pythagoras Theorem

Fermat's Last Theorem

Euclidean Theorem

What is the process of creating a trapezium from scratch known as?

Construction of a Parallelogram

Construction of Trapeziums (correct)

Construction of Special Quadrilaterals

Construction of a Rectangle

In statistics, what is used to represent the distribution of values of a variable?

Frequency Distribution Table Signup and view all the answers

Which mathematical concept deals with principles of counting and arrangements?

Set - Game Signup and view all the answers

What do we call a number that can be expressed as a fraction, where both the numerator and denominator are integers?

Rational Number Signup and view all the answers

What is the formula for the area of a circle with radius $r$?

$\pi r^2$ Signup and view all the answers

If $x^2 + 5x + 6 = 0$, what is the value of $x$?

$x = -2, -3$ Signup and view all the answers

What is the value of $\frac{2}{3} \div \frac{1}{6}$?

12 Signup and view all the answers

If a coin is tossed twice, what is the probability of getting at least one head?

$\frac{3}{4}$ Signup and view all the answers

What is the mean of the data set: {2, 4, 6, 8, 10}?

5 Signup and view all the answers

Expand the expression $(x + 2)(x - 3)$.

$x^2 - 5x + 6$ Signup and view all the answers

What is the scientific notation for the number 0.000456?

4.56 x 10^-4 Signup and view all the answers

Express the number 67,900,000 in scientific notation.

6.79 x 10^7 Signup and view all the answers

Which of the following is the smallest number when written in standard form?

1.28 x 10^-7 Signup and view all the answers

If the radius of an atom is approximately $2.5 \times 10^{-10}$ meters, what is its diameter in scientific notation?

$5 \times 10^{-10}$ meters Signup and view all the answers

The mass of an electron is approximately $9.11 \times 10^{-31}$ kg. Express this in standard form.

0.000000000000000000000000000911 kg Signup and view all the answers

If $2.7 \times 10^8$ bacteria were present initially, and the population tripled every hour, how many bacteria would be present after 5 hours?

$1.215 \times 10^{11}$ bacteria Signup and view all the answers