Changes

*Process:

*Process:

# This construction can be made if the height of the trapezium along with the length of the four sides is known.

# This construction can be made if the height of the trapezium along with the length of the four sides is known.

# Draw a straight line lightly using your ruler and pencil on your paper. - This is what we call a construction line, and will be the base of your trapezoid.

# Draw a straight line lightly using your ruler and pencil on your paper. - This is what is called a construction line, and will be the base of the trapezium.

# Indicate the two end points of the base of your shape with two points, measured by your ruler.<br>

# Indicate the two end points of the base of the shape with two points, measured by ruler.<br>

Note:We know that the top and base line of your trapezoid are parallel, and, we know the distance between them (the height of your shape).

Note:We know that the top and base line of a trapezium are parallel, and, we know the distance between them (the height).

# Using your compass, construct two lines (lightly) perpendicular to your base. On both of these lines measure the height of your trapezoid, and indicate with two points (one on each perpendicular) Connect these two points using a light construction line. The second side of your trapezoid will be 'somewhere' on this line.

# Using compass, construct two lines (lightly) perpendicular to the base. On both of these lines measure the height of the trapezium, and indicate with two points (one on each perpendicular) Connect these two points using a light construction line. The second side of the trapezium will be 'somewhere' on this line.

# Using your ruler, measure the length of your third and fourth sides between these two paralell lines, using the points on your first construction line, as one end of the line segment. Mark with a point.<br>

# Using ruler, measure the length of the third and fourth sides between these two paralell lines, using the points on the first construction line, as one end of the line segment. Mark with a point.<br>

Note: You will now have four construction lines, intersecting at four vertices.

Note: You will now have four construction lines, intersecting at four vertices.

# Your trapezium is the shape contained between the four points of intersection of these four lines.

# The required trapezium is the shape contained between the four points of intersection of these four lines.

# Using a heavier line connect the four points to finish your shape.

# Using a heavier line connect the four points to finish your shape.

*Developmental Questions:

*Developmental Questions: