Scaling Polygons and Basic Operations

The video tutorial covers the concept of scale factors and their application in geometry, particularly with polygons. It explains how to identify corresponding parts in scaled figures, calculate scale factors, and solve for missing lengths and angles. The tutorial also includes exercises on solving basic equations to reinforce understanding of these concepts.

What is a useful method to identify corresponding parts in scaled polygons?

• Using a ruler to measure each side

• Using a calculator

• Highlighting with colored pencils

• Drawing a new polygon

If a polygon is reduced to a quarter of its original size, what is the scale factor?

• 1/5

• 1/4

• 1/3

• 1/2

Which statement is true about the angles in a scaled copy of a polygon?

• They become larger

• They become smaller

• They remain the same

• They disappear

How does the perimeter of a scaled copy compare to the original polygon?

• It is always larger

• It is always smaller

• It can be larger or smaller

• It remains the same

If a side length of 2.5 units becomes 5 units in a scaled polygon, what is the scale factor?

• 1

• 2

• 4

• 3

What is the missing length if 1.5 units is scaled by a factor of 2?

• 3 units

• 2 units

• 1.5 units

• 4 units

What is the measure of an angle in a scaled copy if the original angle is 53 degrees?

• 53 degrees

• 45 degrees

• 90 degrees

• 60 degrees

What number should be multiplied by 8 to get 40?

• 6

• 4

• 7

• 5

What number should be added to 8 to get 40?

• 34

• 30

• 32

• 36

What number should 21 be divided by to get 7?

• 2

• 3

• 4

• 5