Image with description A geometry diagram showing triangle J H K with an interior point G connected to all three vertices. Three right-angle markers indicate that the segments from G meet each side of the triangle at right angles.
B
Image with description A geometry diagram showing an isosceles triangle with vertex D at the top and base F E. Matching marks indicate the two sloping sides are equal, the base is bisected, and line segments from an interior point G connect to the sides, base endpoints, and the midpoint of the base.
C
Image with description A triangle with vertices A at the top left, B at the bottom right, and C at the bottom left. An interior point G is connected to vertices A, B, and C by segments A G, B G, and C G. Additional segments from points on the sides of the triangle also connect to G. A right-angle marker at C indicates that A C is perpendicular to B C.
D
Image with description A geometry diagram showing triangle L M N with an interior point G connected to the vertices and sides by several line segments. Matching angle arcs at vertices L, M, and N indicate marked angles, and the interior segments intersect at point G.