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Sagot :
Answer:
x=12
Step-by-step explanation:
All angles in a triangle always equal 180 degrees
1. Add all of your angles and set them equal to 180
3x+7+74+63=180
2. Simplify
3x+144=180
3. Combine Like-Terms (Subtract 144 from both sides)
3x=36
4. Simplify
x=12
Answer:
x=12
Step-by-step explanation:
To find the missing angle of this scalene triangle you must make sure all three angles add up to 180°.
Since you're already provided with 63° and 74°, you are able to get the third angle:
First, add 63+74, which gets you 137.
Next, subtract 137 from 180. (180-137=43).
So, the missing angle is 43.
Now, to solve for x, here's a reference equation:
3x+7=43.
Subtract 7 from both sides to get:
3x=36.
Then, divide both sides by 3:
3x/3=x,36/3=12
So, you end up with:
x=12.
Hope this helps!
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