Question

Answer this please quickly​

Answer 1

Answer:

$angle \: a \: + angle \: c \: = 180 \\ \frac{1}{2} angle \: a \: + \frac{1}{2} angle \: c \: = \frac{180}{2} = 90.....(i) \\ in \: triangle \: abc \: \\ 90 + angle \: b \: = 180 \\ angle \: b \: = 180 - 90 \\ angle \: b \: = 90$

Answer 2

Answer:

Step-by-step explanation: