Two lines p and q intersect at X at an angle of 38 degrees. Let A be a point inside the 38 degrees angle formed by p and q Let B the reflection of A through line p and Let c be the Reflection of A through line q. Find angle BAC.
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If you can imagine this.....
BA will intersect p at an angle of 90° since A is refected over p to B
And CA will intersect q at 90° since A is reflected over q to C
So angle BAC = 360 - 90 -90 - 38 = 142°