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*Draw an isosceles triangle PQR in which PQ = PR, QR = 6 cm and ∠PQR = 50°.*

Step 1:Draw a straight line QR 6 cm long.

Step 2:Using a protractor draw an angle of 50° from Point Q.

Step 3:Using a protractor draw an angle of 50° from Point R. The angles opposite the equal sides in an isosceles triangle are equal.

Therefore, ∠PQR = ∠PRQ = 50°.

Step 4:Mark the point where the two lines meet as P.

ΔPQR is the required isosceles triangle.

*Draw a right-angled triangle XYZ with ∠XYZ = 90°, YZ = 5 cm and XY = 4 cm.*

Step 1:Draw a straight line YZ 5cm long.

Step 2:Using a protractor draw a right angle (an angle of 90°) from Point Y.

Step 3:Mark the point X so that XY = 4 cm.

Join Point X to Point Z.

Δ is the required right-angled triangle.

*Draw a triangle DEF with ∠DEF = 130°, ∠DFE = 20° and EF = 6 cm.*

Step 1:Draw a straight line EF 6 cm long.

Step 2:Using a protractor draw an angle of 130° from Point E.

Step 3:Using a protractor draw an angle of 20° from Point F.

Step 4:Mark the point where the two lines meet as Point D.

ΔDEF is the required triangle.