Archaeologists discovered a portion of a stone wall. To calculate its original diameter, they marked and measured chord KM and it’s perpendicular bisector. What was the diameter of the original circular wall?

Asunflower was 20 1/2 inches tall. over the next 6 months, it grew to a height of 37 inches tall. what was the average yearly growth rate of the height of the sunflower? ? plz write a proportion to solve i will give you 100 points