Answer:
Step-by-step explanation:
When working with 45-45-90 triangles the hypotenuse is the same as the other legs multiplied by root 2. Therefore if you need to find the legs and already have the hypotenuse, divide the hypotenuse by root 2.
10/ sqrt(2) = 7.1 is the rounded answer.
to double check your work just multiply 7.1 by the square root of 2 and you'll get <em>close</em> to 10. (because the answer is rounded and not exact.)
Given:
The figure of a right triangle.
To find:
The length of AB.
Solution:
In a right angle triangle,
![\cos \theta=\dfrac{Base}{Hypotenuse}](https://tex.z-dn.net/?f=%5Ccos%20%5Ctheta%3D%5Cdfrac%7BBase%7D%7BHypotenuse%7D)
Using this trigonometric ratio for the given triangle, we get
![\cos A=\dfrac{AB}{AC}](https://tex.z-dn.net/?f=%5Ccos%20A%3D%5Cdfrac%7BAB%7D%7BAC%7D)
![\cos (60^\circ)=\dfrac{AB}{10}](https://tex.z-dn.net/?f=%5Ccos%20%2860%5E%5Ccirc%29%3D%5Cdfrac%7BAB%7D%7B10%7D)
![\dfrac{1}{2}=\dfrac{AB}{10}](https://tex.z-dn.net/?f=%5Cdfrac%7B1%7D%7B2%7D%3D%5Cdfrac%7BAB%7D%7B10%7D)
![\dfrac{1}{2}\times 10=AB](https://tex.z-dn.net/?f=%5Cdfrac%7B1%7D%7B2%7D%5Ctimes%2010%3DAB)
![5=AB](https://tex.z-dn.net/?f=5%3DAB)
Therefore, the length of AB is 5 units.
Answer:
C PLEASE GIVE BRAINLIEST
Step-by-step explanation:
218.97 + 303.47 + 77.78 = $600.22
600.22 x .10 = 60.02 (amount of discount)
600.22 - 60.02 = $540.20 (amount he owes)
Answer is C
September 19 , 2018 is the answer
The equation should be 7x^2 -x-9=0