In the diagram ABCD is a trapezium where AD || BC, CD = BA = 6 m, BC = 12 m and DA = 16 m
a Show that DE = 2 m.
b Find the size of D.
The diagram shows a ladder AB. The ladder rests on the horizontal
ground AC. The ladder is touching the top of a vertical telephone pole CB.
The angle of elevation of the top of the pole from the foot of the
ladder is 60° The distance from the foot of the ladder to the foot
of the pole is 2 m.
a Calculate the length of the ladder.
b Calculate the height of the pole.
The ladder is moved in the same vertical plane so that its foot
remains on the ground and its top touches the pole at a point P
which is 1.5 m below the top of the pole.
c Write down the length of CP
d Find the new distance from the foot of the ladder to the foot of the pole.
e Find the size of the new angle of elevation of the top of
the pole from the foot of the ladder.

b

2

−

b

b

3

+

7

b

2

+

14

b

+

6

%

−

3

b

3

+

7

b

2

+

14

b

+

6

%

step-by-step explanation:

constants mean the stopped points or the points on a graph that nothing is changing, hope this

step-by-step explanation:

the answer is: d) o, f, and kr.

atomic radius of bromine (br) is 114 pm.

atomic radius of oxygen (o) is 73 pm.

atomic radius of fluorine (f) is 72 pm.

atomic radius of krypron (kr) is 112 pm.

the atomic radius of a chemical element is a measure of the size of its atom.

the atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

the atomic radius decreases across the periods because an increasing number of protons, because greater attraction between the protons and electrons.

all three statements are true

step-by-step explanation:

a shipping fee of 5% is charged online with every item purchased online

first let's just take each option and calculate them based on this, to see if the answers matched

keith buys a 40 dollar book

40 x 0.05 = 2

therefore there will be a two dollar fee on keith's book

40 + 2 =42

the first statement is true

a chair costs $80

80 x 0.05 = 4

80 + 4 = 84

the second statement is true

george buys a 20 dollar calculator

20 x 0.05 = 1

20 + 1 = 21

the third statements are true

all three statements are true