Q9 of 805 Page 14

Draw an angle of 40°. Copy its supplementary angle.

Step 1: Draw any arbitrary line AB and with the help of a compass draw its bisector CD.



Step 2: Measure AE and draw a quarter arc with the compass placing on A.Repeat for EB.



Step 3: With the same measurement draw an arc from E. Join H and I.mark the intersection of CD and HI as J. Join AJ. Measure angle JAB.



Supplementary angle:


Step 1: Extend BA to K. From E, draw an arc of any radius on the supplement of 40.



Step 2: Draw another line OP and using the compass with the above length draw an arc with O as centre.



Step 3: Measure ML. Draw an arc from Q with the measurement of ML. Join to form OT. Measure angle TOP=135.



More from this chapter

All 805 →
7

Draw an angle of measure 135° and bisect it.

 8

Draw an angle of 70°. Make a copy of it using only a straight edge and compasses.

 1

Construct the following quadrilaterals.

(i) Quadrilateral ABCD.


AB = 4.5 cm


BC = 5.5 cm


CD = 4 cm


AD = 6 cm


AC = 7 cm


(ii) Quadrilateral JUMP


JU = 3.5 cm


UM = 4 cm


MP = 5 cm


PJ = 4.5 cm


PU = 6.5 cm


(iii) Parallelogram MORE


OR = 6 cm


RE = 4.5 cm


EO = 7.5 cm


(iv) Rhombus BEST


BE = 4.5 cm


ET = 6 cm


 1

Construct the following quadrilaterals.

(i) quadrilateral LIFT


LI = 4 cm


IF = 3 cm


TL = 2.5 cm


LF = 4.5 cm


IT = 4 cm


(ii) Quadrilateral GOLD


OL = 7.5 cm


GL = 6 cm


GD = 6 cm


LD = 5 cm


OD = 10 cm


(iii) Rhombus BEND


BN = 5.6 cm


DE = 6.5 cm