Year 9 / Grade 9 • Daily Maths Drill
Ratio, Similarity and Scale
Apply proportional reasoning to similar shapes, scale and rates.
8 questions • 240-question rotating bank • 30 different sets before a full cycle repeats
8Questions
240Question bank
0Best score
💡 Quick Review
Ratio, Similarity and Scale
Similar shapes have equal corresponding angles and proportional corresponding side lengths.
Key ideas
- scale factor
- similar shapes
- maps and scale
- rates
- proportional reasoning
Worked example: scale factor 3 multiplies all corresponding lengths by 3.
Common trap: Areas scale by the square of the length scale factor.
Key words
similar — same shape with proportional sides
scale factor — multiplier between corresponding lengths
corresponding — matching parts
proportion — equal ratios
rate — comparison per unit
How to use this drill: review the short notes when learning, then close them on later attempts and practise from memory. The rotating bank delays a full set repeat for 30 attempts on the same browser.