Question

please answer by solving.​

Answer 1

Answer:

answer is 150⁰ I hope it will help ☺️☺️

Answer 2

Answer:

Option b) 140° is the correct answer.

Given,

$\: \: \: \: \: \: a = \frac{4b}{5} \\ \implies \: 4b = 5a \\ \implies \: b = \frac{5a}{4} \\ \\ \Delta \: ABC \: \implies \: \: \\ \: \: \: \: \: \: \: \angle \: A \: + \angle \: B + \angle \: C = 180 \\ \implies \: 90 + a + b= 180 \\ \implies \: 90 + a + \frac{5a}{4} = 180 \\ \implies \: a + \frac{5a}{4} = 180 - 90 = 90 \\ \implies \: \frac{4a + 5a}{4} = 90 \\ \implies \: 9a = 90 \times 4 = 360 \\ \implies \: a = \frac{360}{9} \\ \implies \: a = 40 \: \\ \\ \: now \: \\ \\ \: \: \: \: \: x + a = 180 \\ \implies \: \: x = 180 - a \\ \implies \: x = 180 - 40 \\ \implies \: x = 140$