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# P(-6, 1) and Q(6, 6) are the two ends of the diameter of…

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**P(-6, 1) and Q(6, 6) are the two ends of the diameter of a given circle. Calculate the radius.**

**A.**** 6.5 units**

**B.**** 13.0 units**

**C.**** 3.5 units**

**D.**** 7.0 units**

**QUICK ANSWER…**

**A**

**DETAILS…**

**If ****P(-6, 1) and Q(6, 6) are the two ends of the diameter of a given circle****, then**** the radius**** will be = 6.5 units.**

**Recall that radius = half of the diameter.**

**This means we would have to:**

**Firstly, calculate the diameter by finding the distance between the two points****P(-6, 1) and Q(6, 6)****.****And then secondly, divide the answer gotten by 2 to obtain the radius.**

**If two points are given as P(x₁, y₁) and Q(x₂, y₂), then the formula to calculate the distance between them is given as:**

**Now for the right answer to the above question:**

**Option A is correct.****Option B is not correct.****C is incorrect.****D is not the correct answer.**

**KEY-POINTS…**

**You may please note these/this:**

**Radius = diameter/2****The distance between the two points****P(****x₁, y₁****) and Q(****x₂****,****y₂****)****can be calculated using EQ1.**

**If you love our answers, you can simply join our community and also provide answers like this, fellow learners like you will appreciate it.**

**/ culled from 20****21**** JAMB-UTME**** MATHEMATICS**** question**** 16 ****/**