the two circles are congruent, the segments are perpendicular, DE=12 and GH=8. How long is the radius? Round to the nearest tenth.

Question

Answer 1

So in this problem the lengths of the points are given.

Remember that the radius is half of the diameter of a circle.

DE=12

GH=8

So you label the intersection any variable.

We label x.

x=DE-GH

You should remember a formula from adding and subtracting lines in a given shape.

x=12-8

x=4

The solution to this problem would turn out to be 4.

ANS: 4

Answer 2

GH and DE are mutually bisecting.

Label intersection O

GO = 4

DO = 6

Use Pythagoras to determine DH - radius.