Question

∠BCD is reflected over the x-axis. If m∠BCD = 35°, what is the measure of ∠BʹCʹDʹ?



35°

55°

135°

145°

Answer 1

A reflex angle is the larger angle and in this problem, it happened that ∠BCD reflected from x-axis with the angle of 35°. It is being asked that was is the angle of ∠B'C'D and the answer is 145°. The solution is we only subtracted 35° to 180°.