PI MATH 100 days of practicing Area, Perimeter, Volume and Surface Area workbook for Beginners: Elementary and Middle School and High School Math (With Answer Key), Geometry for Kids (KS2 KS3 Maths)
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Good review, some of the answers are incorrect.
I believe question 2 on the first work problem (identify area and perimeter for each triangle), area should be 1718.63 but the answer key is 1719.9. Luckily, you can check on Google as well.