Search for notes by fellow students, in your own course and all over the country.
Browse our notes for titles which look like what you need, you can preview any of the notes via a sample of the contents. After you're happy these are the notes you're after simply pop them into your shopping cart.
Title: Construction class 9th.pdf.
Description: Class 9th notes of maths . . Construction 🚧
Description: Class 9th notes of maths . . Construction 🚧
Document Preview
Extracts from the notes are below, to see the PDF you'll receive please use the links above
Class IX Chapter 11 – Constructions
Maths
Exercise 11
...
Answer:
The below given steps will be followed to construct an angle of 90°
...
Draw an arc of some radius taking point P as its centre,
which intersects PQ at R
...
(iii) Taking S as centre and with the same radius as before, draw an arc intersecting
the arc at T (see figure)
...
(v) Join PU, which is the required ray making 90° with the given ray PQ
...
For this, join PS and PT
...
In (iii) and (iv) steps of this construction, PU was
drawn as the bisector of
TPS
...
Answer:
The below given steps will be followed to construct an angle of 45°
...
Draw an arc of some radius taking point P as its centre,
which intersects PQ at R
...
(iii) Taking S as centre and with the same radius as before, draw an arc intersecting
the arc at T (see figure)
...
(v) Join PU
...
(vi) From R and V, draw arcs with radius more than
RV to intersect each other at W
...
PW is the required ray making 45° with PQ
...
WPQ = 45°
...
In (iii) and (iv) steps of this construction, PU was
drawn as the bisector of
TPS
...
∠UPQ
Question 3:
Construct the angles of the following measurements:
(i) 30° (ii)
(iii) 15° Answer:
(i)30°
The below given steps will be followed to construct an angle of 30°
...
Taking P as centre and with some radius, draw an arc
of a circle which intersects PQ at R
...
Step III: Taking R and S as centre and with radius more than
RS, draw arcs to
intersect each other at T
...
(ii)
The below given steps will be followed to construct an angle of
...
Draw an arc of some radius, taking point P as its centre,
which intersects PQ at R
...
(3) Taking S as centre and with the same radius as before, draw an arc intersecting
the arc at T (see figure)
...
(5) Join PU
...
(6) From R and V, draw arcs with radius more than
RV to intersect each other at W
...
(7) Let it intersect the arc at X
...
RX, draw arcs to intersect each other at Y
...
(iii) 15°
The below given steps will be followed to construct an angle of 15°
...
Taking P as centre and with some radius, draw an arc
Step II: Taking R as centre and with the same radius as before, draw an arc
intersecting the previously drawn arc at point S
Title: Construction class 9th.pdf.
Description: Class 9th notes of maths . . Construction 🚧
Description: Class 9th notes of maths . . Construction 🚧