Understanding the Perimeter of Trapezoids

The video tutorial explains how to find the perimeter of a trapezoid. It begins with a definition of a trapezoid, highlighting its properties as a quadrilateral with two parallel sides called bases and two non-parallel sides. The tutorial then demonstrates how to calculate the perimeter by adding the lengths of all sides, using a specific example. It further explores the concept with an isosceles trapezoid, where two sides are of equal length, and shows how to compute its perimeter. The video concludes with a summary of the calculations.

What is a defining characteristic of a trapezoid?

• It has three sides

• All sides are equal

• All angles are right angles

• It has two parallel sides

Tags

CCSS.3.MD.D.8

How do you find the perimeter of a trapezoid?

• Multiply all sides

• Divide the sum of the sides by two

• Add all sides

• Subtract the longest side from the sum of the others

Tags

CCSS.3.MD.D.8

In the example given, what is the perimeter of the trapezoid with sides 4, 5, 6, and 8?

• 23 units

• 25 units

• 20 units

• 18 units

What is a unique feature of an isosceles trapezoid?

• All sides are different lengths

• The bases are equal in length

• The legs are equal in length

• It has no parallel sides

If one leg of an isosceles trapezoid is 5 units, what is the length of the other leg?

• 8 units

• 6 units

• 5 units

• 4 units

Tags

CCSS.3.MD.D.8

How do you calculate the perimeter of an isosceles trapezoid if the legs are 5 units each and the bases are 8 and 4 units?

• Add the lengths of all sides

• Add the lengths of the legs only

• Add the lengths of the bases only

• Multiply the lengths of the bases

Tags

CCSS.3.MD.D.8

What is the perimeter of the isosceles trapezoid with legs of 5 units and bases of 8 and 4 units?

• 22 units

• 24 units

• 20 units

• 18 units

Tags

CCSS.3.MD.D.8