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.