Geometry and TrigonometryEasy–MediumCosine from a leg and hypotenuse
Geometry and Trigonometry practice question
In a right triangle, the leg adjacent to angle A has length 6 and the hypotenuse has length 10. What is the value of cos A?
Answer: 3/5 or 0.6
cos A = adjacent/hypotenuse = 6/10 = 3/5.
Common wrong answers
- If you answered 4/5
- 4/5 is sin A (the opposite leg, 8, over 10).
- If you answered 3/4
- 3/4 is tan A (6 over 8).
- If you answered 5/3
- 5/3 is hypotenuse over adjacent, cos A upside down.
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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