LCOL Co-Ordinate Geometry of the Line

Leaving Cert Ordinary Level Maths LCOL Co-Ordinate Geometry of the Line

LCOL The Line

Your progress through this topic0 of 13 lessons

Lessons in this topic

All 13 lessons.

1Plotting Points2Rise over Run3Slope Formula4Midpoint Formula5Distance between two points6Finding the Equation of a Line7Drawing a Line8y= mx + c9Parallel and Perpendicular lines10Proving a point is on a line11Point of Intersection of two lines12Horizontal and Vertical Lines13Area of a Triangle

Key ideas in this topic

★ Must learn
On the axes

On the x-axis, y = 0; on the y-axis, x = 0. Use this to find where a line crosses each axis.

LCOL The Line 1

📖 In the log tables
Area
AreaLCOL The Line 13
📖 In the log tables
Slope
SlopeLCOL The Line 2
📖 In the log tables
Slope formula
Slope formulaLCOL The Line 3
📖 In the log tables
Midpoint formula
Midpoint formulaLCOL The Line 4
📖 In the log tables
Distance formula
Distance formulaLCOL The Line 5
📖 In the log tables
Equation of a line
Equation of a lineLCOL The Line 6
📖 In the log tables
Y = mx + c
Y = mx + cLCOL The Line 8
★ Must learn
Parallel lines
Parallel lines

Parallel lines have equal slopes.

LCOL The Line 9

★ Must learn
Perpendicular lines
Perpendicular lines

Flip the fraction and change the sign.

LCOL The Line 9

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