Grade 7 · Unit 1 · Lesson 1 · 7.G.A.1 — same shape, different size
One of the four figures is a true scale copy of the original — every side was multiplied by the same scale factor. The rest are impostors.
Pick the figure that is proportional to the original.
Type the scale factor that turns the original into your pick.
Miss a case and it closes — you get a fresh case for that same question, worth up to 3 points instead of 5.
Crack 5 questions to finish. Each is worth 5 points — 2 for the figure, 3 for the scale factor.
🔦 EXTENSION★ BONUS
Case 1
Which figure is proportional to the original? Figures are not drawn to the same scale — trust the numbers.
ORIGINAL
Nice find! Now — what scale factor turns the original into that figure?
Enter a whole number (2), a fraction (3/4), or a decimal (0.5).
Typing a fraction? Tap the a⁄b button to place the division line.
Read the explanation above — take all the time you need.
DETECTIVE TRAINING SHEET
How scale factors work
The one rule: scale factor = answer side number ÷ matching original side number — and it must be the same factor for every side. Bigger copy → factor greater than 1. Smaller copy → factor is a fraction less than 1.
MAKE-UP ROUND
Earn your points back
CASE CLOSED
5 / 5
Five tougher cases with decimal and fraction measurements — in the dark.
Verification code
Provide this code to your teacher for full credit and teacher review.