Question

if (mangle abc = 22) and (mangle cbd = 55), find (mangle abd).

Explanation:

Step1: Identify angle - addition relationship

$\angle ABD=\angle ABC+\angle CBD$

Step2: Substitute given values

$m\angle ABD = 22 + 55$

Step3: Calculate the sum

$m\angle ABD=77$

Answer:

$77$