171° z a) (i) Write down the value of angle x.
X = 65
(ii) Give a reason for your answer.
opposite angles.
b) (i) Write down the value of angle y.
y = 50
(ii) Give a reason for your answer.
180 - 130
65°
c) Work out the size of angle z.
z =

Segment wx is shown explain how you would construct a perpendicular bisector of wx using a compass and a straightedge

The formula for the volume of a right square pyramid is given below, where a is the side length of the base and h is the height.

Aprobability experiment is conducted in which the sample space of the experiment is s={7,8,9,10,11,12,13,14,15,16,17,18}, event f={7,8,9,10,11,12}, and event g={11,12,13,14}. assume that each outcome is equally likely. list the outcomes in f or g. find p(f or g) by counting the number of outcomes in f or g. determine p(f or g) using the general addition rule.