Sorting shapes by their lines
Grade 4 · Level 3 · Sheet 1the answers
Circle the answer.
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- 1.
Is this a right triangle?
yesno - 2.
Is this a right triangle?
yesno - 3.
Is this a right triangle?
noyes - 4.
Is this a right triangle?
yesno - 5.
Is this a right triangle?
noyes - 6.
Is this a right triangle?
noyes - 7.
Is this a right triangle?
noyes - 8.
Is this a right triangle?
yesno - 9.
Is this a right triangle?
noyes - 10.
Is this a right triangle?
noyes - 11.
Is this a right triangle?
yesno - 12.
Is this a right triangle?
noyes
Show the answer key
- 1.no
- 2.yes
- 3.no
- 4.yes
- 5.yes
- 6.yes
- 7.no
- 8.yes
- 9.yes
- 10.yes
- 11.no
- 12.yes
Answer key · Sorting shapes by their lines · Level 3 · Sheet 1
- 1.no
- 2.yes
- 3.no
- 4.yes
- 5.yes
- 6.yes
- 7.no
- 8.yes
- 9.yes
- 10.yes
- 11.no
- 12.yes
The mistakes behind most wrong answers
A wrong answer in sorting shapes by their lines is rarely random. These are the ones that come up most often, each on a real problem — worth knowing before you mark a sheet, because the fix for each is different.
Is this a right triangle?
The answer is no. A child who answers yes probably named a shape from the same family.
In the app, every wrong answer is matched against mistakes like these, and the weekly email tells you which one your child keeps making — in those words, not as a percentage.