There would be 7 in 4 rows
Angle BOC = 65°
Angle AOC =90° ( ∵ it is right angle )
The measure of angle AOB .
Since it is right-angle,
+ 65° = 90°
= 90° - 65°
= 25°
➡ ∠ AOB + ∠ BOC = ∠ AOC
➡ 25° + 65° = 90°
➡ 90° = 90°
➡ L. H. S. = R. H. S
Hence verified. ✔
F(x) = -(x + 1)^2 + 4
Vertex = (-1, 4)
Domain is all real numbers.
Range is f(x) <= 4