Finding Missing Lengths and Solving Perimeter Word Problems

The video tutorial covers the concept of perimeter, explaining how to calculate it for various shapes. It starts with a basic example using a triangle, then progresses to more complex problems involving unknown side lengths. The tutorial includes word problems, demonstrating how to apply perimeter calculations in real-life scenarios like fencing a garden or framing a picture. Key mathematical properties, such as the commutative property, are also discussed to aid in problem-solving.

What is the perimeter of a triangle with sides measuring 4 cm, 3 cm, and 4 cm?

• 13 cm

• 11 cm

• 10 cm

• 12 cm

If a shape has a perimeter of 14 inches and two sides measuring 5 inches each, what is the length of the missing side?

• 6 inches

• 5 inches

• 4 inches

• 3 inches

Which property allows you to rearrange numbers in an addition equation without changing the sum?

• Distributive Property

• Associative Property

• Identity Property

• Commutative Property

In a trapezoid with a perimeter of 17 feet, if three sides measure 3 feet, 4 feet, and 4 feet, what is the length of the missing side?

• 5 feet

• 6 feet

• 7 feet

• 8 feet

Jose has 40 feet of fencing for his garden. If three sides measure 10 feet, 5 feet, and 15 feet, how long is the fourth side?

• 8 feet

• 10 feet

• 9 feet

• 11 feet

Rachel wants to frame her picture with 16 inches of wood. If three sides measure 3 inches, 5 inches, and 3 inches, how much wood is needed for the fourth side?

• 4 inches

• 5 inches

• 7 inches

• 6 inches

What is the first step in solving for a missing side when given the perimeter of a shape?

• Add the known sides and subtract from the perimeter

• Divide the perimeter by the number of sides

• Multiply the known sides

• Subtract the known sides from the perimeter