Geometry and TrigonometryEasy–MediumValue of x from three angle expressions
Geometry and Trigonometry practice question
The three angles of a triangle measure 2x°, 3x° and 4x°. What is the value of x?
Answer: 20
2x + 3x + 4x = 9x = 180, so x = 20.
Common wrong answers
- If you answered 40
- 40 is the smallest ANGLE (2 × 20), not x.
- If you answered 60
- 60 is 180/3, dividing by the number of angles instead of by 9.
- If you answered 80
- 80 is the largest angle (4 × 20).
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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