# Classwork ~ DSGT8734

- Author:
- Arpit Kesharwani, James Quintana

## Warm Up

Triangles B and C have been built by dilating Triangle A.

- Find the center of dilation.
- Triangle B is a dilation of A with approximately what scale factor?
- Triangle A is a dilation of B with approximately what scale factor?
- Triangle B is a dilation of C with approximately what scale factor?

**Answers;**Solution- The center of dilation is here:
- 3
- 13
- 23

## Dilate the figure below by 1/2 and the centre point as B.

## Exit Ticket/Practice

Here is a triangle.

- Draw the dilation of triangle ABC, with center (0,0), and scale factor 2. Label this triangle A′B′C′.
- Draw the dilation of triangle ABC, with center (0,0), and scale factor 12. Label this triangle A″B″C″.
- Is A″B″C″ a dilation of triangle A′B′C′? If yes, what are the center of dilation and the scale factor?

Triangle ABC is a right triangle, and the measure of angle A is 28∘. What are the measures of the other two angles?