MP Board Class 6th Maths Solutions Chapter 14 Practical Geometry Ex 14.6
MP Board Class 6th Maths Solutions Chapter 14 Practical Geometry Ex 14.6
Question 1.
Draw ∠POQ of measure 75° and find its line of symmetry.
Solution:
Steps of construction :
(i) Draw a line l and mark a point O on it.
(ii) Place the pointer of the compasses at O and draw an arc of any radius which intersects the line l at Q.
(iii) Taking same radius, with centre Q, draw an arc which cuts the previous arc at B.
(iv) Join OB, then ∠BOQ = 60°.
(v) Taking same radius, with centre B, draw an arc which cuts the arc drawn in step
(ii) at C.
(vii) Draw OP as bisector of ∠DOB. Thus, ∠POQ = 75°.
Question 2.
Draw an angle of measure 147° and construct its bisector.
Solution:
Steps of construction :
Question 3.
Draw a right angle and construct its bisector.
Solution:
Steps of construction :
Question 4.
Draw an angle of measure 153° and divide it into four equal parts.
Solution:
Steps of construction :
Question 5.
Construct with ruler and compasses, angles of following measures:
(a) 60°
(b) 30°
(c) 90°
(d) 120°
(e) 45°
(f) 135°
Solution:
Steps of construction:
(a) 60°
(iii) Taking P as centre and same radius, draw an arc which cut the previous arc at Q.
(iv) Join OQ and produce it to B. Thus, ∠BOA is the required angle of 60°.
(b) 30°
(iii) Taking P as centre and same radius, draw an arc which cut the previous arc at Q.
(iv) Join OQ and produce it to B. Thus, ∠BOA is the angle of 60°.
(v) Taking P as centre and radius more than half of PQ, draw an arc.
(vi) Taking Q as centre and with same radius, draw an arc which cut the previous arc at C.
(vii) Join OC. Thus ∠COA is the required angle of 30°.
(c) 90°
(iii) Taking X as centre and same radius, draw an arc which cut the previous arc at Y.
(iv) Taking Y as centre and same radius, draw another arc intersecting the arc drawn in step (ii) at ∠.
(v) Taking Y and ∠ as centres and same radius, draw two arcs intersecting each other at S.
(vi) Join OS and produce it to form a ray OB. Thus, ∠BOA is required angle of 90°.
(d) 120°
(iii) Taking P as centre and same radius, draw an arc which cut the previous arc at Q.
(iv) Taking Q as centre and same radius draw another arc intersecting the arc drawn in step (ii) at S.
(v) Join OS and produce it to D.
Thus, ∠AOD is the required angle of 120°.
(e) 45°
(iii) Taking X as centre and same radius, draw an arc which cut the previous arc at Y.
(iv) Taking Y as centre and same radius, draw another arc intersecting the arc drawn in step (ii) at Z.
(v) Taking Y and Z as centres and same radius, draw two arcs intersecting each other at S.
(vi) Join OS and produce it to B. Thus, ∠BOA is the angle of 90°.
(vii) Draw OM the bisector of ∠BOA.
Thus, ∠MOA is the required angle of 45°.
(f) 135°
Question 6.
Draw an angle of measure 45° and bisect it.
Solution:
Steps of construction :
Question 7.
Draw an angle of measure 135° and bisect it.
Solution:
Steps of construction :
Question 8.
Draw an angle of 70°. Make a copy of it using only a straight edge and compasses.
Solution:
Steps of construction:
(iii) Place the compasses at O and draw an arc to cut the rays of ∠POQ at L and M.
(iv) Use the same compasses setting to draw an arc with A as centre, cutting AB at X.
(v) Set your compasses setting to the length LM with the same radius.
(vi) Place the compasses pointer at X and draw the arc to cut the arc drawn earlier at Y.
(vii) Join AY.
Thus, ∠YAX = 70°.
Question 9.
Draw an angle of 40°. Copy its supplementary angle.
Solution:
Steps of construction :
(i) Draw an angle of 40° with the help of protractor, i.e., ∠AOB = 40°.
(iii) Take any point M on PQ.
(iv) Place the compasses at O and draw an arc to cut the rays of ∠AOB at L and N.
(v) Use the same compasses setting to draw an arc M as centre, cutting MQ at X.
(vi) Set your compasses to length LN with the same radius.
(vii) Place the compasses at X and draw the arc to cut the arc drawn earlier at Y.
(viii) Join MY.
(ix) Thus, ∠QMY = 40° and ∠PMY is supplementary of it.
MP Board Class 6th Maths Solutions
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