If ADB = 70°, then ABD =_ degrees m∠ AB = degrees m∠ AD = ____ degrees

Question

If ADB = 70°, then ABD =_____ degrees m∠ AB = ______ degrees m∠ AD = ______ degrees

asked Feb 2, 2017 225k views

1 Answer

Fabian Barney · Answer 1 · 2017-02-07T17:45:52+0000

Diameter of the circle is BD as shown, as indicated and passed through center where BD passes, triangle ABD is a right triangle with angle ABD as the right angle. It means ADB and ABD are complementary which means
AB = 140 degree
AD=40 degree

If ADB = 70°, then ABD =_ degrees m∠ AB = degrees m∠ AD = ____ degrees

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