The Right Way to Solve for Unknown Sides—Are You Doing It?

The video tutorial focuses on solving for unknown side lengths of geometric figures using one-step equations. It begins with a triangle, explaining how to use the perimeter to find the missing side. The process involves setting up an equation, combining like terms, and solving for the variable. The tutorial then moves on to a quadrilateral, clarifying why it is not a trapezoid, and uses a similar method to find the missing side. Finally, it addresses a parallelogram, emphasizing the congruency of opposite sides. The video concludes with a motivational message to continue learning.

What is the perimeter of a triangle with sides measuring 3 cm, 5 cm, and an unknown side X, if the total perimeter is 12 cm?

• X = 4 cm

• X = 3 cm

• X = 6 cm

• X = 5 cm

What is the specific name for a triangle with all sides of different lengths?

• Isosceles

• Right

• Equilateral

• Scalene

Why is the given quadrilateral not a trapezoid?

• It has equal sides.

• It has no right angles.

• It has more than four sides.

• It has no parallel sides.

If a quadrilateral has sides of 5.2 ft, 11.1 ft, 6.4 ft, and an unknown side X, and the perimeter is 34.6 ft, what is the length of X?

• X = 11.9 ft

• X = 12.9 ft

• X = 10.9 ft

• X = 13.9 ft

In a parallelogram, if one side is 8.3 inches and the opposite side is unknown, what is the length of the unknown side if the perimeter is 24.2 inches?

• 5.8 inches

• 4.8 inches

• 3.8 inches

• 6.8 inches