3 years ago

Please bootiful people help this nonsmart person

Mathematics

1 answer:

vlada-n [284]3 years ago

4 0

Answer:

Step-by-step explanation:

the triangle is right angle.

at right angle it makes 90°. therefore;

(3d+1)°+(6d+8)°=90°

3d+1°+6d+8°=90°

9d+9°=90°.

9d=90°-9°

9d=81°

d=81/9

d=9°

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Since the triangle is equilateral, all its angles are equal to 60°

AO is the bisector⇒∠OAD = 30°

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