Find a side from the area
The question
cm
Missing side: area 126, one side 18
How it works.
18 × ? =126
× is undone by ÷
126 ÷ 18 =7 cm
check: 18 × 7 =126
- 01
Forwards, area is one side times the other: 18 × ? = 126.
- 02
The 126 is the answer to that multiplication, so undo it by dividing.
- 03
126 ÷ 18 = 7 cm. Check: 18 × 7 = 126.