What is m∠aeb? enter your answer in the box.

Step-by-step explanation:

In this case, we have two angles defined by an expression. It's important to know that m∠AEB and m∠DEC are congruent, because they are opposite by the vertex angles, which are always equal. So, we only have to equalize these angles each other.

Now, we replace this value in whatever expression, because they are the same.

Therefore, the angle is 115°

the arc length is found by finding the circumference of the full circle (2xpixradius) and then dividing by 4 to find just one quarter of the circle (90 degrees).