Skip to main content
MathidiaMathematics Academy
Transformations and vectors
Lesson 13 of 14
Standard practice

Negative and fractional enlargements

Objective. Enlarge a shape by a fractional or negative scale factor.

  1. 1. Learn
  2. 2. Worked example
  3. 3. Practice
  4. 4. Feedback
  5. 5. Continue

Learn: the key idea

A fractional scale factor shrinks the shape; a negative scale factor also puts it on the opposite side of the centre, upside down.

Worked example

Enlarge point (4, 2) by scale factor −1/2 about the origin.

1/2
Fraction bar showing 1 out of 2 parts shaded
  1. 1Multiply each coordinate by −1/2.
  2. 24 × −0.5 = −2 and 2 × −0.5 = −1.

Answer: (−2, −1)

Concept mastery

Based on your past attempts at this lesson — the question types to practise again come first.

Complete a practice set to see your concept breakdown here.

Practice

Practice happens on its own screen, one question at a time. Answers stay hidden until you submit yours, and you can stop and pick up at the same question later.

Start practising

Common mistake. Shrinking the shape but forgetting to flip it for a negative factor.

Your progress

Tick each step as you finish it. Your exact reading position is saved automatically, so Continue drops you back on the same line.

0 of 5 steps complete

Your place saves automatically as you read.

My dashboard