Point z is equidistant from the vertices of δtuv. point z is equidistant from the vertices of triangle t u v. lines are drawn from point z to the sides of the triangle to form right angles and line segments z a, z b, and z c. which must be true? line segment t a is-congruent-to line segment t b line segment a z is-congruent-to line segment b z anglebtz is-congruent-to anglebuz angletza is-congruent-to angletzb