1,040
edits
Changes
Jump to navigation
Jump to search
Line 264:
Line 264: +
→Activity No # 1. Thales theorem
# The teacher can reiterate a triangle and its elements.
# The teacher can reiterate a triangle and its elements.
# Show them the geogebra file and explain the thales theorm or the basic proportionality theorm which states that a line segment drawn parallel to one side of a triangle divides the other two sides proportionally.
# Show them the geogebra file and explain the thales theorm or the basic proportionality theorm which states that a line segment drawn parallel to one side of a triangle divides the other two sides proportionally.
# She can prove the theorm for different measurements by moving the vertices of the triangle and also by moving D, to change the position of parallel line.
# Also she can use the same file to explain the converse theorm which states that a line segment that divides any two sides of a triangle proportionally is parallel to the third side.
# Also she can use the same file to explain the converse theorm which states that a line segment that divides any two sides of a triangle proportionally is parallel to the third side.
# While proving converse theorm, she can show that since the corresponding angles <ADE = <ABC and <AED = <ACB, the line DE that divides AB and AC proportionally is infact parallel to BC.
# While proving converse theorm, she can show that since the corresponding angles <ADE = <ABC and <AED = <ACB, the line DE that divides AB and AC proportionally is infact parallel to BC.