Q. How do you use a protractor step by step?
Steps to use a protractor:
- Find the cross or circle in the middle of your protractor.
- Place this point at the vertex of the angle you are measuring.
- Read from zero on the outer scale of your protractor.
- Count the degree lines carefully.
- Record your final measurement in degrees (°).
Q. How do you measure angles?
The concept of angle There are two commonly used units of measurement for angles. The more familiar unit of measurement is that of degrees. A circle is divided into 360 equal degrees, so that a right angle is 90°. So seven and a half degrees can be called 7 degrees and 30 minutes, written 7° 30′.
Q. What are 3 devices used to measure angles?
There are several types of measuring tools that measure angles, and they fall into one of three categories: protractors, squares and compasses. There are many variations of these basic categories. A protractor is the most common device used to measure angles.
Q. What does a protractor measure?
Protractor, any of a group of instruments used to construct and measure plane angles. The simplest protractor comprises a semicircular disk graduated in degrees—from 0° to 180°. It is an ancient device that was already in use during the 13th century.
Q. How do you find parallel lines with points?
Correct answer: For parallel lines, the slopes must be equal, so the slope of the new line must also be . We can plug the new slope and the given point into the slope-intercept form to solve for the y-intercept of the new line. Use the y-intercept in the slope-intercept equation to find the final answer.
Q. Do parallel lines have one solution?
1. Parallel Lines: If the two linear equations have the same slope (and different y-intercepts), the lines will be parallel. Since parallel lines never intersect, a system composed of two parallel lines will have NO solution (no intersection of the lines.)
Q. What can parallel lines never do?
When two lines (or rays, or segments) run into each other, it’s called an intersection. Parallel lines don’t have any intersections with each other, since they’ll never run into each other.
Q. What does infinite solutions look like?
An infinite solution has both sides equal. For example, 6x + 2y – 8 = 12x +4y – 16. If you simplify the equation using an infinite solutions formula or method, you’ll get both sides equal, hence, it is an infinite solution.
Q. How do you know if a system has infinite solutions?
If a system has infinitely many solutions, then the lines overlap at every point. In other words, they’re the same exact line! This means that any point on the line is a solution to the system. Thus, the system of equations above has infinitely many solutions.
Q. What is the infinite solution symbol?
Sometimes we use the symbol ∞, which means infinity, to represent infinite solutions.
Q. What is an example of no solution?
When a problem has no solution you’ll end up with a statement that’s false. For example: 0=1 This is false because we know zero can’t equal one. Therefore we can conclude that the problem has no solution.
Q. What if an equation is 0 0?
0/0 is infinite. If we make another equation, 0/0=x, 0*x=0 so ANYTHING times zero is 0. So the answer is infinitely many answers.
Q. How do you tell if a matrix has no solution?
A system has no solution if the equations are inconsistent, they are contradictory. for example 2x+3y=10, 2x+3y=12 has no solution. is the rref form of the matrix for this system.
Q. What does it mean if a matrix has a row of zeros?
If there is a row of all zeros, then it is at the bottom of the matrix. The first non-zero element of any row is a one. That element is called the leading one. The leading one of any row is to the right of the leading one of the previous row. All elements above and below a leading one are zero.
Q. How do you tell if a matrix has a solution?
If the augmented matrix does not tell us there is no solution and if there is no free variable (i.e. every column other than the right-most column is a pivot column), then the system has a unique solution. For example, if A=[100100] and b=[230], then there is a unique solution to the system Ax=b.
