Plz help me! I’m not good at math

What is perpendicular to y=-1/2x+11

21 type the correct answer in each box. if necessary, round your answers to the nearest hundredth the vertices of abc are a(2,8), b(16, 2), and c(6,2). the perimeter of abc is units, and its area is square units

An isosceles trapezoid was broken into a rectangle and two triangles. what are the base and height of one of the triangles?