Practice: how to draw rectangle and angle

This article shows how to draw the rectangle ABCD, AD = 2AB and point E is on side BC and angle BAE = 15°

picture 1

picture 2

There are different ways to draw a geometry constuction shown in picture 1. The following steps are one of constructing methods:


1) From the basic tools select the "add line" tool and add a line, let name it AD


2) Select point A by touching on it, the points tools will be showed

picture 3

3) Use draw perpendicular line from A, draw AB ⊥ AD and AB = 1/2 AD (picture 2)


4) Select point B, and draw BC // AD, BC = AD, draw line from C to D. Now we have a rectangle ABCD with AD = 2AB.

5) Select point A and from A draw arbitrary line AE, and drag the protractor to point A (picture 3), use protractor to rotate AE such as angle EAD = 75°.

6) Use change length tool to move point E to line BC. In the end we have the construction as required.

7.3.2014

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