
Math Enrichment-Exam Review #3
Flashcard
•
Mathematics
•
9th - 12th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the result of rotating a point (x, y) 90° counterclockwise about the origin?
Back
The new coordinates will be (-y, x).
2.
FLASHCARD QUESTION
Front
What is the measure of the angles in a triangle?
Back
The sum of the angles in a triangle is always 180°.
3.
FLASHCARD QUESTION
Front
How do you calculate the mean of a set of numbers?
Back
Add all the numbers together and divide by the total count of numbers.
4.
FLASHCARD QUESTION
Front
What happens to the coordinates of a point (x, y) when it is reflected across the x-axis?
Back
The new coordinates will be (x, -y).
5.
FLASHCARD QUESTION
Front
What happens to the coordinates of a point (x, y) when it is reflected across the y-axis?
Back
The new coordinates will be (-x, y).
6.
FLASHCARD QUESTION
Front
If a point is reflected across the line y = x, what is the new coordinate of the point (x, y)?
Back
The new coordinates will be (y, x).
7.
FLASHCARD QUESTION
Front
What is the formula for finding the distance between two points (x1, y1) and (x2, y2)?
Back
Distance = √((x2 - x1)² + (y2 - y1)²).
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