A Rectangle Has an Area of 345 sq ft and a Width of 15 ft — What’s the Length? | Math with Mr. J
From Math with Mr. J
5 min3rd4thMath
Summary
How to find the area of rectangles -- counting square units or multiplying length by width. Mr. J connects area to multiplication.
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Teaching resources
Discussion questions
Area is the number of unit squares that cover a flat shape; for a rectangle it's length times width.
- What does area measure?
- Why is area given in square units?
- How does multiplication give the area of a rectangle?
Quick work-a-long
Words to know: area, square units, length, width
- Find the area of a 6-by-4 rectangle.
- Draw a rectangle with an area of 12 square units.