Question

ABC IS A RIGHT ANGLE TRIANGLE ,IN WHICH B=90, IF ABD IS AN EXTERIOR ANGLE OF ABC. FIND IS MEASURE.

Answer 1

Answer:

<abc + <abd = 180

90 + <abd = 180

<abd = 90

Answer 2

angle ABC + angle ABD = 180°

90° + angle ABD = 180°

angle ABD = 90°