## How to Draw an Isosceles Triangle and Right-Angled Triangle using Protractor?

#### 1. 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°.

Therefore, ∠PQR = ∠PRQ = 50°.

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

ΔPQR is the required isosceles triangle.

#### 2. 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. Then, join Point X and Point Z.

Δ XYZ is the required right-angled triangle.