In his pocket, a boy has 3 red marbles, 4 blue marbles, and 4 green marbles. how many will he have to take out of his pocket to ensure that he has taken out at least one of each color?

If the slope of one line equals the slope of another line then ? a) the two lines are intersecting lines b) the two lines are perpendicular lines c) the two lines are parallel lines d) the two lines always have very steep slopes

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

What makes a trapezoid an isosceles trapezoid?