Can someone help me with this

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asked Mar 5, 2018 75.9k views

1 Answer

Ryan Kinal · Answer 1 · 2018-03-09T00:58:13+0000

The "base" angles in an isosceles right triangle are 45°. All the angles in an equilateral triangle are 60°. (These are facts that should be in your memory.)

∠ADC = ∠ADB +∠BDC
.. = 45° +60°

∠ADC = 105°

Can someone help me with this

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