volume_mute
Matching composite figures with area expressions
publish date: 2026/05/16 22:07:25.603863 UTC
volume_muteMatch each composite figure description with its correct area expression.
To complete the line match
- Click on an item in the first group
- Click on the match in the second group
To delete a match, double click on a line
Descriptions
Rectangle (length 7) with a 3×4 rectangle attached
Rectangle (length 10) with a 5×2 rectangle removed
Expressions
7×4 + 3×4
10×5 − 5×2
Correct Answer
(1) Rectangle (length 7) with a 3×4 rectangle attached,7×4 + 3×4
(2) Rectangle (length 10) with a 5×2 rectangle removed,10×5 − 5×2
Explanation
Attached rectangles add area; removed rectangles subtract area.
Reference
go-math-science.com