![]() ![]() Furthermore, it offers versatility in usage as it can be customized to an individual's needs, converted into interactive flashcards for efficient learning, or utilized in distance learning modules, fostering an adaptable and engaging learning environment." Comprising 20 problems, it provides practical training in dealing with different degrees of angles, such as 169°, 157°, and 21°. Then, we count up from zero until we find where the other line intersects with the protractor."This worksheet is designed to enhance children's knowledge of mathematics, specifically in finding angles by degrees. We measure by lining up the center of the baseline with the vertex AND the bottom line with the zero on the scale. What number is exactly halfway between these two? One hundred thirty-five! More determined than ever, she gives it another try! When you line up the protractor on this turn, you can see it makes a one hundred eighty degree angle, which is a straight line! Nia has turned the skateboard in the other direction! Remember(.) We use a tool called a protractor to measure the size of an angle. The numbers are one hundred thirty and one hundred forty. How can we use what we know to solve for this measurement? (.) We can find the number that is right BEFORE and right AFTER the intersecting line. When we look at the top line, we see that it does not intersect on a number. We line up the protractor the same way every time(.) bottom line is on zero. Using the protractor, we can find the exact measurement of this obtuse angle. Nia has turned her board HALFWAY! On this turn, we can tell that Nia has gone more than ninety degrees because the opening is wide. What do you notice about where this line intersects? (.) It measures ninety degrees and makes a right angle. Next, you want to see where the top line crosses. First, place the center of the baseline on the vertex and line up with the zero on the OUTER scale. Let’s see how far she has moved the board on her next try. Nia moved the skateboard thirty degrees and made an acute angle. What number on the scale does this line intersect with? The line is crossing through the number THIRTY on the outer scale. To determine the degrees of the turn, look at the SECOND line that makes up the angle. Since Nia is facing LEFT, we will use the numbers on the OUTER scale. To measure, use the set of numbers on the scale that are facing the SAME DIRECTION as your angle opening. The numbers on the scale are grouped by tens with smaller dashes that count by fives. What do you notice about the numbers on the scale? The scale has two sets of numbers from zero to one hundred eighty, going in opposite directions. Now look at the rounded part of the protractor, called the SCALE. In the center of the baseline, you will see a "black dot surrounded by a circle." In order to measure an angle, place this area directly over the VERTEX and line up the bottom line with the zero on the far left side. ![]() It looks familiar, doesn’t it? This ruler is what we will use to make straight lines and it also helps measure the angle openings. Look at the bottom straight edge(.)We call this the "baseline". While we measure Nia’s first turn, let’s take a look at the parts of a protractor. Can you point to the opening, or arc, of each angle? This is the area we need to measure to know what type of angle we have. Angles can be acute(.), right,(.)obtuse(.), or straight(.) depending on the opening size. We name the angles by how wide the opening of the ARC is and measure these in degrees. Remember, angles are made by two lines that meet at an endpoint, called the VERTEX. : "Angles and Measuring Angles" Nia's turns will be measured by the angles they create. We can track her progress by using a special tool called a PROTRACTOR. Nia found a skateboard in the attic and is learning how to do some cool tricks! She is practicing making turns with the board.
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