Definition of Base Angle Theorem. Base Angle Theorem states that if two sides in a triangle are congruent, then the angles opposite to these sides are also congruent. 1  Base angles of an isosceles triangle are equal.
Restores the destroyed forest. The Spring Sprite is the protagonist of The Firebird Suite segment of Fantasia 2000. The Spring Sprite is a benevolent force of life and creation. She loves the forest and its creatures, and is happy to bring spring every year.
Firefly appears with Mr. Freeze facing the Batman (though Firefly is wearing the same uniform as the Firefly design of The Batman). Following the Final Crisis, Firefly was with Cheetah III's Secret Society of Super Villains at the time when Genocide was created.