The area of a parallelogram is just base × height — the same idea as a rectangle. So if your rectangle area and multiplication facts are warm, parallelograms click instantly. You also need to know which side is the base and which measurement is the height.
Answer these 3, then press Show my path. No grade — this just points you to the right level.
1. What is 8 × 4?
2. A rectangle is 5 cm long and 3 cm wide. What is its area?
3. Area is measured in which kind of units?
Area is how many unit squares fit inside a shape. For a rectangle you multiply length × width. A parallelogram works the same way: multiply the base by the height (the straight-up distance, not the slanted side).
Your quick check picks one for you, but you can switch any time:
Level 0 Build up rectangle area one step at a time.
A. What is 4 × 3?
4 groups of 3 is 12.
B. A rectangle is 7 units long and 2 units wide. Area = 7 × 2 = ___?
7 × 2 = 14 square units.
C. A rectangle is 5 units by 5 units. What is its area?
5 × 5 = 25 square units.
Level 1 Find the base and height, then multiply.
A. A parallelogram has a slanted side of 6 and a straight-up height of 4. Which number is the height?
Height is always perpendicular (straight up), so it is 4.
B. A parallelogram has base 8 and height 3. Area = 8 × 3 = ___?
Base × height = 8 × 3 = 24 square units.
Level 2 Stretch into full parallelogram area.
A. A parallelogram has base 9 and height 6. What is its area?
9 × 6 = 54 square units.
B. A parallelogram has base 10 and height 4.5. What is its area?
10 × 4.5 = 45 square units.
1. A rectangle is 6 by 7. What is its area?
6 × 7 = 42 square units.
2. For a parallelogram, which measurement do you multiply with the base?
Area = base × perpendicular height.
You've practiced exactly what Lesson 5-1 uses. Time to dive in.
Start Lesson 5-1 →