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Q&A for How to Find the Perimeter of a Polygon
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QuestionWhat should I do when I don’t feel motivated to do homework?Jake Adams is an academic tutor and the owner of Simplifi EDU, a Santa Monica, California based online tutoring business offering learning resources and online tutors for academic subjects K-College, SAT & ACT prep, and college admissions applications. With over 14 years of professional tutoring experience, Jake is dedicated to providing his clients the very best online tutoring experience and access to a network of excellent undergraduate and graduate-level tutors from top colleges all over the nation. Jake holds a BS in International Business and Marketing from Pepperdine University.First, create a plan for doing the homework and build in breaks or rewards. For example, get one task done and then set a reward for yourself to take a 15-minute break to call a friend or to go outside for a walk.
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QuestionIf I get stressed while studying, how can I stay positive so I can do better on exams?Jake Adams is an academic tutor and the owner of Simplifi EDU, a Santa Monica, California based online tutoring business offering learning resources and online tutors for academic subjects K-College, SAT & ACT prep, and college admissions applications. With over 14 years of professional tutoring experience, Jake is dedicated to providing his clients the very best online tutoring experience and access to a network of excellent undergraduate and graduate-level tutors from top colleges all over the nation. Jake holds a BS in International Business and Marketing from Pepperdine University.Build a positive reinforcement loop for yourself by having a plan. For example, take the test day and then work backwards from that and decide what things you need to get done during the time you have. Then work towards those things. It's putting one foot in front of the other. It's also being realistic. If you realize the plan is not possible, but you'll still get through about 80% of it, you're still going to probably do okay in the class. You've done the best that you can. It takes this weight off of your shoulders of having to be perfect. Instead, it's I have to do the best that I can in any given circumstance and that's all I can do.
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QuestionHow do you find the perimeter and area of a polygon?This answer was written by one of our trained team of researchers who validated it for accuracy and comprehensiveness.wikiHow Staff EditorStaff AnswerTo find the perimeter, add up the lengths of all the sides of the polygon. Finding the area can be a little more complicated, since it depends on what kind of shape you’re dealing with. To calculate the area of a regular polygon, multiply ½ x p (the perimeter) x a (the apothem, or the distance from the center of the polygon to the midpoint of any side). If the polygon is irregular, you’ll need to divide it up into regular shapes (e.g., a rectangle and a triangle), find the area of each part, and add them together.
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QuestionHow do you find the perimeter of a weird shape?This answer was written by one of our trained team of researchers who validated it for accuracy and comprehensiveness.wikiHow Staff EditorStaff AnswerAs long as it’s made up of straight lines, finding the perimeter is as simple as adding up the lengths of all the sides. If there are curves involved, it can get a bit more complex! For instance, if your shape is made up of 3 straight sides and a semicircle, you’d need to add the 3 straight sides plus the arc length of the curved side (in the case of a semicircle, .5 x π x diameter of the semicircle).
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QuestionHow do you find the perimeter if there’s a missing side?This answer was written by one of our trained team of researchers who validated it for accuracy and comprehensiveness.wikiHow Staff EditorStaff AnswerIt depends on the kind of shape you’re dealing with. If the polygon is all right angles, you can easily use the known lengths of the other sides to figure out the length of the missing side. If there are non-right angles, break down the shape into right-angled triangles and use the Pythagorean theorem (a^2+b^2=c^2) to solve for the missing lengths.
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QuestionThe length of the sides of a pentagon are consecutive odd integers. What is the perimeter if the longest side is 15?DonaganTop AnswererThe four consecutive odd integers just below 15 are 7, 9, 11 and 13, so the perimeter is 7 + 9 + 11 + 13 + 15 = 55.
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QuestionHow do I find the perimeter of a pentagon with sides of lengths 12m, 50m, 88m, 125m and 100m?DonaganTop AnswererAdd the five lengths together.
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QuestionWhat is the perimeter of the polygon 12.7 by 8 by 11.4 by 7.3?DonaganTop Answerer12.7 + 8 + 11.4 + 7.3 = 39.4.
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QuestionI have a regular octagon with an area of 55cm^2. How do I find the side length if the perimeter is not given?DonaganTop AnswererThe area of a regular octagon is equal to the square of the side, multiplied by 4.828. A = (4.828)(a²). Therefore, a² = A / 4.828, and a = √(A/4.828) = √(.207)(A). Use 55 for A, and calculate a.
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QuestionWhat is the area of a hexagon with all of the sides being 10 cm?DonaganTop AnswererThe area formula for a regular hexagon is [(3√3) / 2] s², where s is the length of a side. So in this case it's (2.598)(10)² = 259.8 square centimeters.
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QuestionWhat is the perimeter of a pentagon if each side is 90 cm?DonaganTop AnswererMultiply 90 cm by 5.
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QuestionIf length and width isn't given, what do I do?Community AnswerAre the angles given? If they are you can split the polygon into triangles and use the sine and cosine rules to find the sides.
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QuestionThe sides of a polygon have length of 5 cm, 3 cm, 7 cm, 10 cm and 12 cm. The perimeter of a similar polygon is 148 cm. What is the length of the smaller side of the other polygon?DonaganTop AnswererThe first perimeter is 5 + 3 + 7 + 10 + 12 = 37 cm. The ratio of the first perimeter to the second perimeter is 37:148. The ratio of the first polygon's smallest side to the second polygon's smallest side is also 37:148. Let x be the length of the second polygon's smallest side. Then 3 / x = 37 / 148. By cross-multiplying, 37x = 444. So x = 12 cm.
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QuestionWhat is the perimeter of a decagon with all the sides 33 inches and the area 50.7818 inches?DonaganTop AnswererIf each of the ten sides measures 33 inches, the perimeter is 10 x 33 = 330 inches.
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QuestionHow do I find the perimeter of a polygon when the length of one side is unknown?DonaganTop AnswererAs your question is posed, the perimeter cannot be found. You would have to know some angles.
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