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magicalpenguin48
11.06.2021 •
Mathematics
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.
Solved
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Ответ:
No, the triangular numbers are not a direct variation. There is not a constant of variation between a number and its position in the sequence. The ratios of the numbers to their positions are not equal. Also, the points (1, 1), (2, 3), (3, 6), and so on, do not lie on a line.
Hope this helps!!! :)