Question

If m∠BDC = 125, what is the m∠ABD?
click on picture to see

Answer 1

since angle BDC is 125, what can you tell me about angle ADB?

Answer 2

its an acute triangle

Answer 3

can you tell me the measure of angle ADB?

Answer 4

No?

Answer 5

look at the picture... angle BDC and angle ADB are supplementary.... that means their measures add up to 180 degrees.

Answer 6

Okay so whats the m<ABD

Answer 7

you'll need to answer the questions I asked in order to get m<ABD....

to get m<ABD, notice that triangle ABD is an isosceles triangle....