Match correctly
`{:((a),"centroid",(1),"medians of a"Delta),((b),"incentre",(2),"centre of the circumcircle point of intersection"),(,,,"of the perp. bisectors of the sides of a"Delta),((c),"Circumcentre",(3),"point of intersection of the medians of a"Delta),((d),"concurrent",(4),"centre of the incircle point of intersection of the"),(,,,"angle bisectors of a"Delta):}`

Answer

To solve the problem of matching the terms related to a triangle, we will analyze each term and its definition step by step.

### Step 1: Identify the definition of Centroid
The centroid of a triangle is defined as the point of intersection of the medians of the triangle.

**Match:**
- (a) "centroid" matches with (3) "point of intersection of the medians of a triangle".

### Step 2: Identify the definition of Incenter
The incenter is defined as the point of intersection of the angle bisectors of a triangle.

**Match:**
- (b) "incentre" matches with (4) "centre of the incircle point of intersection of the angle bisectors of a triangle".

### Step 3: Identify the definition of Circumcenter
The circumcenter is defined as the point of intersection of the perpendicular bisectors of the sides of a triangle.

**Match:**
- (c) "Circumcentre" matches with (2) "centre of the circumcircle point of intersection of the perpendicular bisectors of the sides of a triangle".

### Step 4: Identify the definition of Concurrent
The term "concurrent" refers to the point where the medians of a triangle intersect.

**Match:**
- (d) "concurrent" matches with (1) "point of intersection of the medians of a triangle".

### Final Matches:
- (a) "centroid" → (3) "point of intersection of the medians of a triangle"
- (b) "incentre" → (4) "centre of the incircle point of intersection of the angle bisectors of a triangle"
- (c) "Circumcentre" → (2) "centre of the circumcircle point of intersection of the perpendicular bisectors of the sides of a triangle"
- (d) "concurrent" → (1) "point of intersection of the medians of a triangle"