Test Corrections!

Questions and you get right?

1. is to approximate an answer.
2. is an estimate that is larger than the actual answer.
3. is an estimate that is smaller than the actual answer.
4. 12.63 + 9.05 + 7.92 = 296
5. 857.643-349.832=507.8110

Test corrections #13

Question is "a figure resulting from a transformation is called a(n) ______________."

Answer is "Image"

Test Corrections # 5

Question:

A coordinate grid has

the following set of ordered pairs: (2,-2), (0,-4), (3.0), (4,1), (5,2), (6,3). The point (0,-4) is out of place.

How I got the answer wrong:

Instead of plotting down (-2,-5), I plotted down (-2,-4). So now the points: (-2,-4) and (0,-4) look out of place. But the question said only (0,-4) was out of place not (-2,-5). So I wrote FALSE instead of TRUE. That is how I got the answer wrong.

Blue: (0,-4) - The number that was out of place.

Green: (-2,-4) - The wrong ordered pair

Here is a link on plotting ordered pairs.

Here is a Video on plotting ordered pairs.

Test corrections for # 5

Question:

Indicate whether the statement is true or false.

___ 5. A coordinate grid has the following pairs

(-2,-5), (0,-4), (3,0), (4,1), (5,2), (6,3), The point (0,4) is out of place.

How I got the answer wrong...

Well first, I plotted all of the points on a coordinate grid and it showed me this...

Light Green being all the other points

Dark Green being (0,-4)

I thought that since the (-2,-5) is further away from all the other points, it is also out of place with (0,-4) so I put F-for false. BUT I WAS WRONG!

Answer:

The answer is T-for true. Even though (-2,-5) are further away from the other ordered pairs, they all still form a straight diagonal line. The only point out of place is (o,-4).

Here's a link to fun games about coordinate grids.

Here's a Video about Horizontal and Vertical Distances

Test Correction For Question 22

Question :
Use the coordinate grid shown to do the following:
a) Rotate ABC 90 degrees in a counter clockwise direction about centre of rotation C.
b) Translate A' B' C' 3 units right and 3 units down.
c) What are the coordinates of B"

Answer :
a) rotated 90 degrees counter clockwise.



















b) translated A' B' C' 3 units right and 3 units down.

















c) (1,0)


; here is a game you can play to practice rotation.

Test corrections for question 11

Question:

A line of reflection is also called a                         ?

Answer:

Mirror line.

test corrections #2

question : translations,rotations,and reflections change the size of sides or angles of the original figure



answer : is false the transformation does not change the size of sides or angles of the original figure