ABC is a straight line BD = BC
Angle ADB = 80
Angle BDC = 20
18 - 202160
160-180
Work out the size of the angle marked x.
Give reasons for your answer.

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.

How many verticies does a triangular prims have

If the equation of a perpendicular bisector of a triangle is y = 2x + 7, what is the slope of the side that it is bisecting? explain how you know.