In all isosceles triangles, the exterior angle of a base angle must always be
A a right angle
B an acute angle
C an obtuse angle
D equal to the vertex angle

You can find it by multiplying the areas it show u

Ineed with this same question!

The heir to the austrian throne, archduke franz ferdinand was gunned down by a young serbian terrorist. germany urged austria to declare war on serbia. russia mobilized against austria, then germany mobilized against russia. france and britain mobilized against germany. then young men such as adolf hitler volunteered in the war.