_{I Before Reading} 2

_{II Construction} 4

_{A Drawing Segment} 5

_{A.1 The Instruction In Course Work} 5

_{A.2 The Original Picture} 5

_{A.3 The Buttoms (or Objects) You Need to Click} 5

_{A.4 The Final Picture} 5

_{B Draw New Point} 6

_{B.1 The Instruction In Course Work} 6

_{B.2 The Original Picture} 6

_{B.3 The Buttoms (or Objects) You Need to Click} 6

_{B.4 The Final Picture} 7

_{C Drawing Line} 8

_{C.1 The Instruction In Course Work} 8

_{C.2 The Original Picture} 8

_{C.3 The Buttoms (or Objects) You Need to Click} 8

_{C.4 The Final Picture} 9

_{D Drawing Midpoint} 9

_{D.1 The Instruction In Course Work} 9

_{D.2 The Original Picture} 9

_{D.3 The Buttoms (or Objects) You Need to Click} 10

_{D.4 The Final Picture} 10

_{E Double the Line Segment} 11

_{E.1 Purpose} 11

_{E.2 The Original Picture} 11

_{E.3 The Buttoms (or Objects) You Need to Click} 11

_{E.4 The Final Picture} 12

_{F Construct a Perpendicular Line} 12

_{F.1 The Instruction In Course Work} 12

_{F.2 The Original Picture} 12

_{F.3 The Buttoms (or Objects) You Need to Click} 14

_{F.4 The Final Picture} 14

_{G Draw a Congrent Segment} 15

_{G.1 Purpose} 15

_{G.2 The Original Picture} 15

_{G.3 The Buttoms (or Objects) You Need to Click} 15

_{G.4 The Final Picture} 15

_{III Editing Command} 16

_{H Undo} 17

_{H.1 The Purpose of "Undo"} 17

_{H.2 The Original Picture} 17

_{H.3 The Buttoms (or Objects) You Need to Click} 18

_{H.4 The Final Picture} 18

_{I Clear} 19

_{I.1 The Purpose of "Clear} 19

_{I.2 The Original Picture} 19

_{I.3 The Buttoms (or Objects) You Need to Click} 19

_{I.4 The Final Picture} 19

_{J Undo} 20

_{J.1 The Purpose of "Redo"} 20

_{J.2 The Original Picture} 20

_{J.3 The Buttoms (or Objects) You Need to Click} 20

J.4 _{The Final Picture} 21

_{K Delete} 21

_{K.1 The Purpose of "Delete"} 21

_{K.2 The Original Picture} 22

_{K.3 The Buttoms (or Objects) You Need to Click} 22

_{K.4 The Final Picture} 22

_{I Before Reading}

This document will explain how to use the EPGY course work geometry interface buttom by buttom.

For each buttom, we will include:

The instruction in class work or the purpose, e.g. “del”, “redo”, “undo”,…

The original picture

The sequence of clicking bottoms

The final picture

Notice: The aim of this document is to explain how to use the interface, but not showing the answer of how to do the course work. Students may need to read the requirements in the question carefully, e.g. in A below you must SELECT the segment you have drawn to provide the answer. If not, you have only drawn the segment but fail to provide the answer.

_{II Construction}

There are 7 buttoms for constructing figures.

The buttoms are shown below:

Use of these 7 buttoms will be explained in the next 7 sections.

_{A Drawing Segment}

_{A.1 The Instruction In Course Work}

“Draw a line through points A and F”

_{A.2 The Original Picture}

_{A.3 The Buttoms (or Objects) You Need to Click}

_{A.4 The Final Picture}

_{B Draw New Point}

_{B.1 The Instruction In Course Work}

“Choose a new point where AD and BC intersect”

_{B.2 The Original Picture}

_{B.3 The Buttoms (or Objects) You Need to Click}

_{B.4 The Final Picture}

_{C Drawing Line}

_{C.1 The Instruction In Course Work}

“Draw a line through points A and F. Select the line you drew to answer”

_{C.2 The Original Picture}

_{C.3 The Buttoms (or Objects) You Need to Click}

_{C.4 The Final Picture}

_{D Drawing Midpoint}

_{D.1 The Instruction In Course Work}

"Find the midpoint of segment AB"

_{D.2 The Original Picture}

_{D.3 The Buttoms (or Objects) You Need to Click}

_{D.4 The Final Picture}

_{E Double the Line Segment}

_{E.1 Purpose}

Double the line segment in the direction of A.

_{E.2 The Original Picture}

_{E.3 The Buttoms (or Objects) You Need to Click}

_{E.4 The Final Picture}

_{F Construct a Perpendicular Line}

_{F.1 The Instruction In Course Work}

"Construct a line perpendicular to segment AF at A."

_{F.2 The Original Picture}

_{F.3 The Buttoms (or Objects) You Need to Click}

_{F.4 The Final Picture}

_{G Draw a Congrent Segment}

_{G.1 Purpose}

Draw a segment at B which is congruent to AF and towards the direction D

_{G.2 The Original Picture}

_{G.3 The Buttoms (or Objects) You Need to Click}

_{G.4 The Final Picture}

_{III Editing Command}

There are 4 buttoms for editing figures.

The buttoms are shown below:

Use of these 4 buttoms will be explained in the next 4 sections.

_{H Undo}

_{H.1 The Purpose of "Undo"}

To delete the previous step.

_{H.2 The Original Picture}

_{H.3 The Buttoms (or Objects) You Need to Click}

_{H.4 The Final Picture}

_{I Clear}

_{I.1 The Purpose of "Clear}

Clear all you have drawn

_{I.2 The Original Picture}

Suppose you have draw three things: 1) a segment AD, 2) a point G and 3) a line BE

_{I.3 The Buttoms (or Objects) You Need to Click}

_{I.4 The Final Picture}

_{J Undo}

_{J.1 The Purpose of "Redo"}

If you have drawn the something, but press ‘undo’ or ‘delete’ wrongly, and want to draw (redo) again.

_{J.2 The Original Picture}

_{J.3 The Buttoms (or Objects) You Need to Click}

_{J.4 The Final Picture}

_{K Delete}

_{K.1 The Purpose of "Delete"}

_{K.2 The Original Picture}

_{K.3 The Buttoms (or Objects) You Need to Click}

_{K.4 The Final Picture}