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please help me with this question​

Please Help Me With This Question class=

Sagot :

Answer:

angle AOD = 90⁰

BOD = 3x⁰

90⁰+3x⁰ = 180⁰( being straight angle)

3x = 180⁰-90⁰

3x = 90⁰

x = 90⁰/3

x = 30⁰

now

y⁰+139⁰ = 180⁰(being straight angle)

y⁰ = 180⁰-139⁰

y⁰ = 41⁰