Using a pair of compasses, a ruler and a pencil, construct a triangle CDE in which DE =10cm, DC= 8cm and angle DE= 45 degree

Answer 1

To start with,

Construct a right angle.
Bisect it.
Measure off the lengths.
Label the points.

Then figure out what the heck angle "DE" is.

Answer 2

Using a pencil, pair of compasses and our ruler, construct and shade the locus of points that lie inside triangle ABC, are more than 5cm from point B and closer to side AC than side AB. Use your drawing to determine which picture below best represents all such points.