.omtex-content-wrapper {
font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
line-height: 1.6;
color: var(--text-color);
max-width: 900px;
margin: 0 auto;
padding: 20px;
background-color: var(--bg-light);
}
/* Header Styling */
.geometry-header {
background-color: var(--white);
border-left: 6px solid var(--secondary-color);
padding: 20px;
margin-bottom: 25px;
border-radius: var(--border-radius);
box-shadow: var(--shadow);
}
.geometry-header h1 {
color: var(--primary-color);
margin: 0;
font-size: 1.8rem;
font-weight: 700;
}
.geometry-header h2 {
color: var(--secondary-color);
font-size: 1.2rem;
margin-top: 10px;
font-weight: 500;
text-decoration: underline;
}
/* Content Sections */
.content-card {
background: var(--white);
padding: 25px;
margin-bottom: 20px;
border-radius: var(--border-radius);
box-shadow: var(--shadow);
}
.section-title {
color: var(--accent-color);
font-size: 1.4rem;
border-bottom: 2px solid #eee;
padding-bottom: 10px;
margin-bottom: 20px;
font-weight: 700;
text-transform: uppercase;
}
/* Objectives List */
.objectives-list {
list-style: none;
padding: 0;
}
.objectives-list li {
position: relative;
padding-left: 30px;
margin-bottom: 12px;
font-size: 1.1rem;
}
.objectives-list li::before {
content: '➤';
position: absolute;
left: 0;
color: var(--secondary-color);
font-weight: bold;
}
/* Paragraph Styling */
p {
margin-bottom: 15px;
text-align: justify;
}
/* Image Styling */
.img-container {
text-align: center;
margin: 25px 0;
background: #fff;
padding: 10px;
border-radius: var(--border-radius);
}
.img-container img {
max-width: 100%;
height: auto;
border-radius: 4px;
transition: transform 0.3s ease;
}
.img-container img:hover {
transform: scale(1.02);
}
/* Highlighting */
.nature-highlight {
color: var(--accent-color);
font-weight: bold;
display: block;
margin-top: 20px;
font-size: 1.2rem;
}
/* Responsive Design */
@media (max-width: 600px) {
.omtex-content-wrapper { padding: 10px; }
.geometry-header h1 { font-size: 1.5rem; }
.content-card { padding: 15px; }
}
Learning Objectives
- To know about lines, line segments and rays.
- To know angles and its types.
- To know the usage of ruler and protractor.
- To identify parallel and intersecting lines.
- To identify pairs of complementary and supplementary angles.
- To know collinear points and point of concurrency.
Chapter 4: GEOMETRY
Introduction
Geometry means the measurement of the earth. It includes the study of the properties of shapes and its measures. In ancient days, geometry was developed for the practical purpose of construction, surveying and various crafts.
Nature evolves out of simple geometrical shapes and patterns from tiny atoms to huge galaxies. The objects that you see in your environment have an impact of geometrical ideas. An appealing appearance of houses and buildings are made possible by geometrical thinking. Vehicles like cycle, car, bus are designed using geometrical concepts. The toy that you play with, the tools like pencil, scale and book that you use with, give rise to geometrical ideas and shapes.
In this chapter, we will learn about the geometrical concepts such as lines, line segments, rays and angles.
MATHEMATICS ALIVE – NATURE’S GEOMETRIC MASTERPIECES
