Geometry Concepts and Formulas

The video tutorial reviews the area and perimeter of various polygons, including rectangles, squares, parallelograms, trapezoids, and circles. It introduces key terms like apothem and explains how to calculate the area and perimeter for each shape. The tutorial also covers the concept of cross-sections in 3D shapes, providing examples and practical applications.

What is the term used to describe the distance from the center of a polygon to the middle of a side?

• Radius

• Diameter

• Perimeter

• Apothem

How do you calculate the area of a rectangle?

• Add all sides

• Multiply length by width

• Multiply base by height

• Add length and width

If a square has sides of length 5 inches, what is its perimeter?

• 25 inches

• 20 inches

• 15 inches

• 10 inches

What is the formula to find the area of a parallelogram?

• Base times height

• Length times width

• Base plus height

• Side times side

How do you find the area of a trapezoid?

• Base plus height

• Length times width

• Height times (Base1 + Base2) / 2

• Base times height

What is the height of a trapezoid if its area is 50 square inches, base1 is 8 inches, and base2 is 12 inches?

• 6 inches

• 4 inches

• 7 inches

• 5 inches

Which formula is used to find the circumference of a circle?

• Pi times radius squared

• Pi times diameter

• Radius times 2

• Diameter divided by pi

If the diameter of a circle is 8 meters, what is its radius?

• 6 meters

• 8 meters

• 2 meters

• 4 meters

What shape is the cross-section of a cylinder when cut parallel to its base?

• Square

• Oval

• Triangle

• Circle

What shape is the cross-section of a cone when cut perpendicular to its base?

• Square

• Oval

• Circle

• Triangle