|Here are 4 steps of construction of a specific figure. It's like a stop motion movie. Each numbered step matches with one instruction. What is the first one?
Ο Trace a triangle rectangle named ABC.
Ο Trace a right triangle named ABC.
| What is the next one?
Ο Trace the circle of center B going through point A. Place point I at intersection of BC and this circle.
Ο Trace the circle whose radius is AI.
| What is the third one?
Ο Draw the parallel line to AB.
Ο Draw the perpendicular line to AC passing by I.
| What is the last one?
Ο The parallel to AB going through I intersects AC at point J. Place J.
Ο This perpendicular line goes through point J. Find J.
|Now, it is up to you to imagine instructions in order to get the number-4 figure. What would be the first one?|
|What segment has been added in step 2?|
|Point E is at intersection of which lines?|
|In step #4, how is line EF with respect to line DC?|
We are going to draw a geometrical figure, step by step. You have to find which instruction is given to see the blue object
O Trace a line.
O Trace a square.
O Trace a point.
O Trace a point C.
O Trace a circle cutting the line in 2 points.
O Trace a circle going throuhg point C.
O Trace a circle whose radius is C.
O Trace a circle whose center is C. It must intersect the line at two points.
O Name D and E the intersection points of circle and line.
O Place D and E.
O Trace circle whose center is C and radius CD.
O Trace circle whose center is D and radius CD.
O Trace circle whose radius is CE and center C.
O Trace circle of center E and radius EC.
O Place F.
O Place F at intersection of two circles.
O Place F as symmetrical of C with respect to line.
It's up to you to write the next instruction.
I took my square set and check that...
O line CF is perpendicular at the first line.
O line CF is perpendicular to the first line.
O line CF is perpendicular on the first line.
Finally, what can we do from one point, and one line, and all these steps.