Verify identity cot^2x + csc^2x = 2csc^2x - 1

Which of the following statements is not true? a.parallel lines are lines in the same plane that never intersect. b.congruent figures have the same shape and same size angles and sides. c.similar figures must have the same shape and the same size. d.a rotation is when you turn a figure around a certain point.

12 out of 30 people chose their favourite colour as blue caculate the angle you would use for blue on a pie chart

6cm10 cma conical paper cup has dimensions as shown in the diagram. how much water can the cup hold when full?