Work Shown:
angle1+angle2+angle3 = 180
90+65+(x-10) = 180
x+145 = 180
x = 180-145
x = 35
Explanation:
I'm using the idea that the 3 inside angles of any triangle add to 180 degrees. That's how I got the equation set up. Afterward, we combine like terms. The last step is to subtract 145 from both sides to fully isolate x.
C) 35
All triangles have a total of 180 degrees.
Setting Up an Equation
We know that the sum of all angles in a triangle will be 180 degrees. So, we can create an equation that adds all of the angles together, then set this equal to 180.
Then, we can use this to solve for x.
Finding X
To find x we can isolate the variable. Firstly, combine like-terms.
Then, subtract 155 from both sides.
Now, add 10 to both sides.
This means that x = 35. Also, the angles measurements are 90, 65, and 25.
