BitWithBite
Mathematics Worksheet
🔍 Similarity
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Use a scale factor to find missing sides.Understand that corresponding sides are in proportion.Understand that corresponding angles are equal.Apply the AA similarity criterion.📚 Quick Recap
Similar figures have the same shape but not necessarily the same size — one is a scaled-up or scaled-down version of the other, with all angles matching and sides in the same proportion.
🧠 Section A · Concept Check ● BEGINNER 4 × 1 = 4
1△ABC has sides 4, 5, 6; a similar triangle has scale factor 2.5. Its sides are:
2Two similar triangles have corresponding sides 8 and 20. The scale factor is:
3Similar rectangles: 6 → 18 (factor 3); the smaller's other side is 4, so the larger's is:
4In similar figures, corresponding angles are:
🧮 Section B · Problem Solving ● INTERMEDIATE 2 + 3×3 = 11
5Similar figures have the same but possibly different size.
6Corresponding sides of similar figures are in .
7Triangle ABC has sides 4, 5, 6. A similar triangle has scale factor 2.5. Find its sides.
8Two similar triangles have corresponding sides 8 and 20. Find the scale factor.
9Similar rectangles have sides 6 and 18; the smaller's other side is 4. Find the larger's.
🚀 Section C · Challenge ● CHALLENGE 5
10What must be true about corresponding angles in similar figures?
💭 Reflection — the most useful thing I learned:
A ___/4 B ___/11 C ___/5 Total ___/20
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✂ answer key — fold or cut before handing out
1-A 2-A 3-A 4-B | 5 shape 6 proportion 7 = 10, 12.5, 15 8 = 2.5 9 = 12 (scale factor 3) | 10 = They must be equal