Which is the only center point that lies on the edge of a triangle? the incenter of a right trianglethe incenter of an obtuse trianglethe circumcenter of a right trianglethe circumcenter of an obtuse triangle?

Circumcenter of a right triangle is the only center point that lies on the edge of a triangle.

Step-by-step explanation:

Circumcircle is the circle that passes through all three vertices of the triangle.

When the perpendicular bisectors of a triangle intersect at a point, that point i called circumcenter. The circumcenter is also the center of the triangle's circumcircle.

The circumcenter of a right triangle lies exactly at the midpoint of the hypotenuse . It is the only center point that lies on the edge of a triangle.

18

step-by-step explanation:

draw the shape and you will see that f and k are actually at adjacent vertices (points of the hexagon that are neighboring).   so find the distance between (1,2) and (4,2).   that is easy since (1,2) and (4,2) is just a vertical distance to count, which is 3.   it is a regular polygon which means all sides are congruent.   you have 6 sides (hexa) so multiply 6 by 3 to receive 18.

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step-by-step explanation: