Geometry and TrigonometryEasy–MediumWidth of a screen from its diagonal
Geometry and Trigonometry practice question
A rectangular television screen has a diagonal of 17 inches and a height of 8 inches. What is the width of the screen, in inches?
Answer: 15
√(17² − 8²) = √(289 − 64) = √225 = 15.
Common wrong answers
- If you answered 9
- 9 subtracts 8 from 17.
- If you answered 25
- 25 adds 17 and 8.
- If you answered 18.8
- 18.8 adds the squares instead of subtracting.
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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