Triangle Properties and Dilation Concepts

This video tutorial covers the concept of dilations in geometry, focusing on problems involving quadrilaterals and triangles. It explains how to perform dilations with different scale factors and how to calculate angles in a right triangle. The tutorial provides step-by-step instructions for identifying the center of dilation, measuring distances, and applying scale factors to find new points. It also includes methods for determining scale factors between different triangles.

What is the scale factor used to dilate quadrilateral ABCD?

• 3

• 1

• 4

• 2

How do you find the center of dilation for triangles B and C?

• By using a protractor

• By drawing straight lines from corresponding angles

• By measuring the angles

• By calculating the area

What is the approximate scale factor of triangle B as a dilation of triangle A?

• 1

• 1/2

• 2

• 4

If triangle A is a dilation of triangle B, what is the approximate scale factor?

• 4

• 1/2

• 1

• 1/4

What is the scale factor for the dilation of triangle ABC with center at (0,0) and scale factor 2?

• 1/2

• 2

• 3

• 1

When dilating triangle ABC with a scale factor of 1/2, what is the new position of point A?

• 2 to the right and 1 down

• 4 to the right and 2 down

• 3 to the right and 1 down

• 1 to the right and 1 down

Is triangle A''B''C'' a dilation of triangle A'B'C'? If yes, what is the scale factor?

• Yes, scale factor 2

• Yes, scale factor 1/2

• No, not a dilation

• Yes, scale factor 1/4

What is the sum of all angles in a triangle?

• 270 degrees

• 360 degrees

• 180 degrees

• 90 degrees

If one angle of a right triangle is 28 degrees, what is the measure of the other non-right angle?

• 62 degrees

• 72 degrees

• 82 degrees

• 52 degrees

In a right triangle, what is the measure of the right angle?

• 90 degrees

• 120 degrees

• 60 degrees

• 45 degrees