# [SOLVED]236 GRE exam Three circles with centers on the same line segment PQ

#### karush

##### Well-known member

ok this is what I posted on the

mathquiz community
it was done by simple observation
typos maybe,,,,

#### skeeter

##### Well-known member
MHB Math Helper
One should not assume the two smaller diameters are equal ...

Large circle diameter, $D = PR+RQ$

$\pi D = \pi(PR+RQ) = \pi \cdot PR + \pi \cdot RQ$

#### karush

##### Well-known member
good point...

yes I know often the GRE diagrams are not for assumptions
so just adding as equal term is not absolute