Question

calculate the value of 4x and 5x of right angle

Answer 1

$right \: angle \: = \: 90 \\ \\ 4x + 5x = 90 \\ \\ 9x = 90 \\ \\ x = \frac{90}{9} \\ \\ x = 10$


So ,

$4x = 4 \times 10 = 40 \\ \\ 5x = 5 \times 10 = 50$