Geometry and TrigonometryEasy–MediumMiddle angle on a straight line
Geometry and Trigonometry practice question
Three angles on a straight line measure 50°, x°, and 70°. What is the value of x?
Answer: 60
The three add to 180: x = 180 − 50 − 70 = 60.
Common wrong answers
- If you answered 20
- 20 is the difference between the two given angles.
- If you answered 120
- 120 subtracts only the 50, or only the 70 from 190.
- If you answered 240
- 240 subtracts from 360.
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?
Not affiliated with the College Board. SAT is a trademark of the College Board.