2 years ago

PLZ!!!! HELP ASAP!!! Problem is in the picture

Mathematics

1 answer:

Strike441 [17]2 years ago

5 0

Step-by-step explanation:

pythagoras theorem: c²=a²+b²

Where c= longest side of a right angle triangle

AB= 6+r = c

AD= 12 =a

CD= r =b

(6+r)² = 12²+ r²

36+12r+r² =144 +r²

12r+r²-r²=144-36

12r=108

r= 108/12

r=9

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