Answer:
Solution given:
b=9 base side of isosceles triangle
a=
I don’t see a picture or anything? Can you explain more I don’t know the sides
B.) 6?....
This seems too easy for it to be correct but I think it is B.
The answer is 3.141529
<span>I'm right.</span>
See the picture attached to better understand the problem
we know that
A quadrilateral is called Cyclic quadrilateral <span>if its all vertices lie on the circle.
</span><span>The opposite angles of a Cyclic - quadrilateral are supplementary
</span>so
∠A+∠C=180°
and
∠
B
+∠D=180°
therefore
the answer is<span>
C) The sum measure of ∠B and ∠D equals 180°</span>