2 years ago

Need help and will mark brainlist and thank You

Mathematics

1 answer:

Furkat [3]2 years ago

6 0

Answer:

Step-by-step explanation:

Angles ABO, BAO, and AOB are the angles of isosceles triangle AOB. The angles at A and B are equal, so we have ...

AOB +2ABO = 180° . . . . . sum of angles in the triangle

100° +2ABO = 180° . . . . . . use the given value

50° +ABO = 90° . . . . . . . . divide by 2; next, subtract 50°

∠ABO = 40°

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