Self Practice 2024-12-13: Flashcardziz
Flashcard
•
Mathematics
•
8th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the ratio of the angles in a triangle if they are in the ratio 3:3:4?
Back
The angles are 3x, 3x, and 4x. The sum of angles in a triangle is 180 degrees. Therefore, 3x + 3x + 4x = 180, which gives x = 10. The angles are 30 degrees, 30 degrees, and 40 degrees. The largest angle is 40 degrees.
2.
FLASHCARD QUESTION
Front
What is a 6-digit positive integer where the first three digits are the same as the last three digits?
Back
An example is 247247. This type of number is called a 'repeating number'.
3.
FLASHCARD QUESTION
Front
What is the formula for calculating the factorial of a number?
Back
The factorial of a number n, denoted as n!, is the product of all positive integers up to n. For example, 5! = 5 × 4 × 3 × 2 × 1 = 120.
4.
FLASHCARD QUESTION
Front
How do you calculate the sum of the first n natural numbers?
Back
The sum of the first n natural numbers is given by the formula S = n(n + 1)/2. For example, the sum of the first 8 natural numbers is 8(8 + 1)/2 = 36.
5.
FLASHCARD QUESTION
Front
What is the product of 0.000315 and 7,928,564?
Back
The product is approximately 2400.
6.
FLASHCARD QUESTION
Front
What is the perimeter of a triangle?
Back
The perimeter of a triangle is the sum of the lengths of its three sides.
7.
FLASHCARD QUESTION
Front
What is the area of a triangle given its base and height?
Back
The area A of a triangle is given by the formula A = (base × height) / 2.
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