Question

Anyone know? A. 99 B. 100 C. 121 D. Cannot be determined

Answer 1

Since, it is given that the pentagon ABCDE is congruent to pentagon FGHIJ.

By being congruent, the corresponding angles and sides are equal.

Therefore, $\angle A = \angle F$, $\angle B = \angle G$, $\angle C = \angle H$, $\angle D= \angle I$, $\angle E = \angle J$.

By using $\angle A = \angle F$

So, $100^\circ = \angle 1$

Therefore, the measure of angle 1 is 100 degrees.

So, Option B is the correct answer.