Drawing Triangles using Geometrical Instruments - Part 3

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


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

drawing a right-angled triangle
Step 2: Using a protractor draw an angle of 130° from Point E.

drawing a right-angled triangle
Step 3: Using a protractor draw an angle of 20° from Point F.

drawing a right-angled triangle
Step 4: Mark the point where the two lines meet as Point D.

drawing a right-angled triangle
Δ DEF is the required triangle.