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# How to work this out URGENT!! Watch

1. work out the value of A

left bottom size of the triangle = 65 degrees
top part of the triangle = a degrees
bottom right side is 138 degrees
2. The total angles in a triangle add up to 180 degrees remember x
3. (Original post by Hassnain Aslam)
work out the value of A

left bottom size of the triangle = 65 degrees
top part of the triangle = a degrees
bottom right side is 138 degrees
138+65=203
4. (Original post by Hassnain Aslam)
work out the value of A

left bottom size of the triangle = 65 degrees
top part of the triangle = a degrees
bottom right side is 138 degrees
Do you think you could post a picture, or maybe check the angles? They shouldn't be 65 degrees and 138 degrees..
5. (Original post by khaleesi98)
The total angles in a triangle add up to 180 degrees remember x
He said the bottom right is 138?
6. (Original post by TheOtherSide.)
Do you think you could post a picture, or maybe check the angles? They shouldn't be 65 degrees and 138 degrees..
Yeah exactly that doesn't make any sense then
7. (Original post by zXcodeXz)
Yeah exactly that doesn't make any sense then
8. (Original post by Hassnain Aslam)
180-138=42 because angles on a straight line add up to 180 then 65+42=107 for top angle in the triangle then 360-107=253 is answer for a
9. (Original post by Hassnain Aslam)
Okay, so you're trying to find the angles inside the triangle.

For the top corner, use the fact that angles around a point add to 360 degrees to work out that angle.

For the corner on the right, use 'angles on a straight line add to 180 degrees'
10. (Original post by zXcodeXz)
180-138=42 because angles on a straight line add up to 180 then 65+42=107 for top angle in the triangle then 360-107=253 is answer for a
You would take away 107 from 180 because all angles in a triangle add up to 180 to get the missing angle in the triangle. Then you would subtract the missing angle from a.

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