Geometry and TrigonometryEasy–MediumPerimeter of a rectangle from its area and length
Geometry and Trigonometry practice question
A rectangle has an area of 36 square units and a length of 9 units. What is the perimeter of the rectangle?
Answer: 26
The width is 36/9 = 4, so the perimeter is 2(9 + 4) = 26.
Common wrong answers
- If you answered 13
- 13 is half the perimeter.
- If you answered 18
- 18 doubles the length only.
- If you answered 45
- 45 adds the area and the length.
More Geometry and Trigonometry questions
- Easy–Medium
A circle has a radius of 6. What is its area? (Use A = πr².) - Easy–Medium
A right triangle has legs of length 6 and 8. What is the length of the hypotenuse? - Easy–Medium
A circle has a radius of 5. What is its circumference? (Use C = 2πr.) - Easy–Medium
What is the midpoint of the segment joining the points (2, 3) and (8, 11)? - Easy–Medium
What is the measure, in degrees, of angle B? - Easy–Medium
What is the area, in square centimeters, of the trapezoid?
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