Answer:
∠GHI = 90° and coordinates of point K will be (8, -6)
Explanation:
The given figure ABCD is reflected across EF to coincide with the points G, J, I and H.
We have to tell the measurement of ∠GHI. After reflection image formed by G,J,I and H will be similar.
Therefore ∠GHI = 90°
Now this figure GHIJ is reflected across x-axis then we have to find the coordinates of new point G.
Since point G(8, 6) is lying in the first quadrant, when reflected across x axis the new point K lies in 4th quadrant and the coordinates of K will be (8, -6).