CSEC Maths - Transformations - Enlargements

[@ESCOBARRZ]

Doing enlargement I understood that the essential part of it are the "center of enlargement and the scale factor". When these are discovered you are able to produce a image and when the scale factor "k" is negative the image will be on the opposite side. Also when calculating area its base times height over 2.

[@nikitajulien5409]

This is confusing

[@rajendramisir3530]

When k = -2, the image is larger than the object, the object and image lie on opposite sides of the center of enlargement and the image is inverted.

[@rajendramisir3530]

The area of the object equals the area of the image divided by k squared. The scalar factor, k, equals the square root of the ratio of the areas of the image and object.

[@jessicabrown7984]

I understand thanks so much!

[@CSECMathematics]

Great...You will most likely get a transformation question tomorrow.

[@jessicabrown7984]

Okay. I have a question though. What do they mean when they ask to state geometrical relationships between two things

[@ayannalewis8470]

Another question that can come on enlargement is to find the area what I am going to show you how to treat with the area is First Triangle A, B, C the area 2×3÷2 remember area of triangle is base by height = 3units A, B, C prime 6×9÷2 which mean 2×3=6 and 3×3= 9 that's base by height so in that case A, C= 6 base and height = 2= 6/2= 3units and A, B = base is 9and height is 3 = 3units How do we get the scale factor we just look at length image and divided by object A ' B' C' prime is 3 units K=3 Area A K × ABC (3)× (3) which is 9×3=27 to get the 27 you multiply the units by the length

[@ayannalewis8470]

Good afternon sir and classmate

[@ayannalewis8470]

Centre of enlargement and also the scale factor (-6,-2) k =2

[@CSECMathematics]

So after watching all these videos, we are expecting a grade I right?

[@ayannalewis8470]

@@CSECMathematics yes sir you as my tutor is distinctions I love maths

[@ayannalewis8470]

The image is smaller and also note the images lies between center I together with the object

[@ayannalewis8470]

O(1,2) our scale factor (-2) what that means whenever you have a negative sign in front of the enlargement your image will be on the opposite side of the enlargement remember K is a scale factor this our object and image The image is larger than our object centre of enlargement the object and image lies on the opposite side of the centre of enlargement

[@mohammedalimohammed2595]

Are u a teacher

[@ayannalewis8470]

No am not

[@ayannalewis8470]

Well I did not explain not to find the exact image OA Prime is = 10 units and OB is 5 units

[@ayannalewis8470]

Afternoon sir

[@ayannalewis8470]

Enlargement Transformation A, B, C we want to undergo an enlargement if you wanna describe enlargement you need to give the centre of enlargement and give a scale factor so in this case this point(-6,-2) center of enlargement and scale factor is (2) How we perform the scale factor of enlargement well this triangle what you do draw a line form A and extend it and from B extend it and C extend it then take your ruler and measure the distance let O the distance prime in order to get thats point OA which will be twice that distance so A prime 2 OA remember I get the (2) because is scale FACTOR OB prime 2OB and OC prime2OC A prime is 2 units and AB 4 units for each length B prime2 AB 4 units inntjis case the Image is large than otherrr object because of enlargement lines

[@ayannalewis8470]

When you have less than our images will be smaller and our object is bigger and also if greater than our images bigger and our object is smaller

[@kevinprince9726]

I understand that scale factor is less so than 2 the image size decrease a

[@ESCOBARRZ]

Kevinn🤣a foolishness yah talk dawg

[@ayannalewis8470]

Sorry to enlargement is from OA , OB , OC

[@ayannalewis8470]

Good morning sir

[@ayannalewis8470]

The image is larger than the object

[@aaliyahhlove]

How u get 2 as the scale factor

[@chatwithnel6476]

The scale factor has to be 2?

[@krystaliejohn3286]

Confusing

[@candyjohnson5023]

Confusing much