Identify the three triangles in the given figure.

Hint: Here we can see that the various triangles are formed by the three different non collinear coordinates of joining a point. So here we clearly need to verify the diagram and identify the various and different coordinates through which the unique triangle can be formed.

Complete step-by-step answer:
As from the given diagram above we have to identify the three triangles.
Here , on observing the diagram we can see that triangles formed by different coordinates are \[\vartriangle ABC\] and further we can observe that other triangles are \[\vartriangle ABD\] and \[\vartriangle ADC\] .
Hence, all the three coordinates of triangles are determined and the given is shown.

Note: A triangle is a polygon with three edges and three vertices. It is one of the basic shapes in geometry.
A right-angled triangle is a triangle in which one angle is a right angle. The relation between the sides and angles of a right triangle is the basis for trigonometry. The side opposite the right angle is called the hypotenuse. The sides adjacent to the right angle are called legs.