**Answer
1** :

Steps of construction :

(i) Draw a line segment BC = 3.6 cm.

(ii) At B, draw a ray BX making an angle of 60° and cut off BE = 4.8 cm.

(iii) Join EC.

(iv) Draw perpendicular bisector of CE which intersects BE at A.

(v) Join AC.

∆ABC is the required triangle.

**Answer
2** :

Steps of construction :

(i) Draw a line segment BC = 4.5 cm.

(ii) At B, draw a ray BX making an angle of 45° and cut off BE = 5.6 cm and join CE.

(iii) Draw the perpendicular bisector of CE which intersects BE at A.

(iv) Join AC.

∆ABC is the required triangle.

**Answer
3** :

Steps of construction :

(i) Draw a line segment BC = 3.4 cm.

(ii) At B, draw a ray BX making an angle of 45° and cut off BE = 1.5 cm.

(iii) Join EC.

(iv) Draw the perpendicular bisector of CE which intersects BE produced at A.

(v) Join AC.

∆ABC is the required triangle.

**Answer
4** :

Steps of construction :

(i) Draw a line segment BC = 7 cm!

(ii) At B, draw a ray BX making an angle of 60° and cut off BE = 12 cm.

(iii) Join EC.

(iv) Draw the perpendicular bisector of EC which intersects BE at A.

(v) Join AC.

∆ABC is the required triangle.

**Answer
5** :

Steps of construction :

(i) Draw a line segment PQ = 10 cm.

(ii) At P, draw a ray PX making an angle of 90° and at Q, QY making an angle of 60°.

(iii) Draw the angle bisectors of ∠P and ∠Q meeting each other at A.

(iv) Draw the perpendicular bisectors of AP and AQ intersecting PQ at B and C respectively,

(v) Join AB and AC.

∆ABC is the required triangle.

**Answer
6** :

Steps of construction :

(i) Draw a line segment BC = 6 cm and bisect it at D.

(ii) With centre B and radius 6 cm and with centre D and radius 4 cm, draw arcs intersecting each other at A.

(iii) Join AD and AB and AC.

Then ∆ABC is the required triangle.

**Answer
7** :

Steps of construction :

(i) Draw a line segment BC = 6 cm

(ii) At B, draw a ray BX making an angle of 90° and cut off BE = 10 cm.

(iii) Join EC and draw the perpendicular bisector of CE which intersects BE at A.

(iv) Join AC.

∆ABC is the required triangle.

**Answer
8** :

Steps of construction :

(i) Draw a line segment PQ = 6.4 cm.

(ii) At P draw a ray PX making an angle of 60° and at Q, a ray QY making an angle of 45°.

(iii) Draw the bisector of ∠P and ∠Q meeting each other at A.

(iv) Draw the perpendicular bisectors of PA and QA intersecting PQ at B and C respectively.

(v) Join AB and AC.

∆ABC is the required triangle.

Using ruler and compasses only, construct a ∆ABC, from the following data:

AB + BC + CA = 12 cm, ∠B = 45° and ∠C = 60°.

**Answer
9** :

Steps of construction :

(i) Draw a line segment PQ = 12 cm.

(ii) Draw ray PX at P making are angle of 45° and at Q, QY making an angle of 60°.

(Hi) Draw the angle bisectors of ∠P and ∠Q meeting each other at A.

(v) Draw the perpendicular bisector of AP and AQ intersecting PQ at B and C respectively.

(v) Join AB and AC.

∆ABC is the required triangle.

**Answer
10** :

Steps of construction :

(i) Draw a line segment PQ =11 cm.

(ii) At P, draw a ray PL making an angle of 30° and Q, draw another ray QM making an angle of 90°.

(iii) Draw the angle bisector of ∠P and ∠Q intersecting each other at X.

(iv) Draw the perpendicular bisector of XP and XQ. Which intersect PQ at Y and Z respectively.

(v) Join XY and XZ.

Then ∆XYZ is the required triangle

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