.omtex-card {
background: #ffffff;
border-radius: 8px;
box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
padding: 25px;
margin-bottom: 25px;
border-left: 5px solid #008e70;
}
.omtex-header {
text-align: center;
margin-bottom: 30px;
border-bottom: 2px solid #eee;
padding-bottom: 15px;
}
.omtex-header h1 {
color: #2c3e50;
font-size: 28px;
margin: 0;
}
.omtex-header h2 {
color: #7f8c8d;
font-size: 18px;
font-weight: 400;
margin-top: 10px;
}
.section-title {
color: #008e70;
font-size: 22px;
font-weight: 700;
margin-bottom: 15px;
display: flex;
align-items: center;
}
.activity-box {
background-color: #e3f2fd;
border-left: 5px solid #0070c0;
padding: 20px;
margin: 20px 0;
border-radius: 0 8px 8px 0;
}
.activity-title {
color: #0070c0;
font-weight: 700;
font-size: 1.2rem;
margin-bottom: 10px;
display: block;
}
.note-box {
background-color: #fdf2f2;
border-left: 5px solid #943634;
padding: 20px;
margin: 20px 0;
border-radius: 0 8px 8px 0;
}
.note-title {
color: #943634;
font-weight: 700;
font-size: 1.2rem;
margin-bottom: 10px;
display: block;
}
.content-image-container {
text-align: center;
margin: 25px 0;
}
.content-image-container img {
max-width: 100%;
height: auto;
border-radius: 4px;
box-shadow: 0 1px 4px rgba(0,0,0,0.1);
}
.inline-symbol {
vertical-align: middle;
height: auto;
max-width: 40px;
}
.math-text {
font-style: italic;
font-family: "Times New Roman", Times, serif;
font-weight: bold;
}
/* Responsive adjustments */
@media (max-width: 600px) {
.omtex-content-wrapper { padding: 10px; }
.omtex-card { padding: 15px; }
.omtex-header h1 { font-size: 22px; }
}
Two lines
Now let us get back to two lines (Fig. 4.2). Lines that go on forever on either side without meeting each other (i.e. they have a constant distance in between) are called parallel lines.
Thus, parallel lines go forever without meeting.
What will happen if two lines are not parallel?
Then they must meet somewhere! Of course, they go their way after meeting too.
Here, l1 and l2 are called intersecting lines.
Of course, we now have parallel line segments and intersecting line segments too.
The position ‘O’ at which the line segments 
and 
meet is called their point of intersection.
Activity
Take a piece of paper and fold in as many ways as you can, always generating parallel lines, or always generating intersecting lines.
A few examples are shown for you.
Note
A line has no end points, whereas a line segment has end points. We can measure the length of a line segment.
