Grade 7 Math · Geometric and Spatial Reasoning

Perform dilations and describe the similarity between the image and the original shape

30 tutor-authored questions for this Ontario curriculum expectation, ordered easiest to hardest, every one with a full worked solution. Work through all 30 with your weekly-lesson access code.

Start the 30 questions Curriculum: G7-E1.3

Sample: the first question, solved

What is a dilation, in basic terms?

📘 Worked solution
A transformation that changes the size of a shape (enlarging or shrinking it) while keeping its shape the same.

And one from the hard end

A shape's perimeter after dilation is 90cm, and the scale factor used was 2.5. Find the original perimeter.

Solution shown after you try it in practice mode.

Work through all 30, easiest to hardest

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