Cho tam giác ABC nhọn có E, F,G lần lượt là trung điểm của AB, AC, BC, AH là đường cao. CM: a/ tứ giác FEDC là hình thang
b/ tứ giác GEFC là hình bình hành
c/ tứ giác EFGH là hình thang cân

Find the equation of the line that goes through the points (4, –1) and (2, –5). use slope formula,equation,to find the slope of a line that passes through the points. m = use slope-intercept form, y = mx + b, to find the y-intercept (b) of the line. b = write the equation in slope-intercept form, y = mx + b.

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5