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Finding perimeter when a side length is missing | Math | 3rd grade | Khan Academy
By Khan Academy
Lindsay finds the perimeter of a figure when a side length is not given.
Grade 3 Math Perimeter 3 MD 8
By EngageNY
Solve real world problems involving perimeters of polygons, including finding the perimeter given the side lengths and finding an unknown side length
Identifying proportional relationships
By Khan Academy
Is the perimeter of a square proportional to the side length of the square?
Estimating Products | MathHelp.com
By MathHelp.com
This lesson covers perimeter. Students learn that the perimeter of a figure is the distance around the figure, so the perimeter of a figure can be found by adding the lengths of its sides. Since all four sides of a square are equal in length, the perimeter of a square that has a side with a length of 8 feet is 8 + 8 + 8 + 8, or 32 feet. Since opposite sides of a rectangle are equal in length, the perimeter of a rectangle that is 4.5 meters by 6.2 meters is 4.5 + 4.5 + 6.2 + 6.2, or 21.4 meters.
Perimeter | MathHelp.com
By MathHelp.com
This lesson covers naming angles. Students learn the definition of an angle and the concept of measure, including the following vocabulary: side, vertex, protractor, degrees, right angle, acute angle, obtuse angle, and straight angle. Students also learn what assumptions can and cannot be made from a given figure.
Surface Area of a Pyramid | MathHelp.com
By MathHelp.com
This lesson covers the definition of perpendicular lines. Students learn the definition of perpendicular lines and use algebra to find the measures of angles in problems that involve perpendicular lines. Students are also asked to determine whether given information is sufficient to determine if two lines are perpendicular.
Perimeter Word Problems | MathHelp.com
By MathHelp.com
This lesson covers the area of a trapezoid. Students learn that a trapezoid is a quadrilateral with one pair of parallel sides, and the formula for the area of a trapezoid is 1/2 times (base 1 + base 2) times height. For example, the area of a trapezoid that has bases of 10 centimeters and 12 centimeters and a height of 8 centimeters is 1/2 times (10 + 12) times 8, which simplifies to 1/2 times 22 times 8, or 11 times 8, which is 88 square centimeters.
Geometry Introduction - Basic Overview - Review For SAT, ACT, EOC, Midterm Final Exam
By The Organic Chemistry Tutor
2nd Grade Math Compilation
By
2nd Grade math is fun with these learning videos! Each lesson can help students with word problems, math games or help prepare for a test! Great for a review of 2nd grade or for an introduction!
Learn XY Coordinate Plane, Graphing Points, Lines & Distance - [5-9-15]
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
Area for Kids
By
Math is fun! Learn about area in this math video for kids! You will learn the difference between perimeter and area, learn how area works and even learn how to find the area of rectangles and squares!