Question

Will give medal.

In the figure below, triangle ABC is an equilateral triangle, and quadrilateral DEFB is a square.

https://app107.studyisland.com/pics/154646num31CAB.png

What is m(angle)ABD?

Answer 1

approximatly 172 degrees

Answer 2

It can't be 172. It's an acute angle.

Answer 3

I think it's 45. One of the angles is 90 (as the square proves) and the other is 45 (from the triangle). 90 + 45 = 135, and 180 - 135 = 45.

Answer 4

Actually, I did that math wrong. It's not 45; it's 60. So the answer is 30 degrees.