यूरोप में राष्ट्रवाद का निर्माण

यूरोप में राष्ट्रवाद का निर्माण(Source:NCERT Books)  महत्वपूर्ण तिथियां:- 1.1797:- नेपोलियन का इटली पर हमला ; नेपोलियाई युद्धो की शुरुवात 2.1814-1815 नेपोलियन का पतन, वियना शांति संधि 3.1821:- यूनानी स्वतंत्रता के लिए संघर्ष प्रारम्भ 4.1848:- फ्रांस में क्रांति 5.1859-1870:- इटली का  एकीकरण 6.1866-1871:- जर्मनी का  एकीकरण 7.1905:- ऑटोमन और  हैब्सबर्ग साम्राज्य की मजबूती से उदय 8. … Read more

Chapter 7 Triangles

Chapter 7.TrianglesDefinition:- a closed figure formed by three intersecting lines is called a triangle. (‘Tri’ means ‘three’). A triangle has three sides, three angles and three vertices. For example, in triangle ABC, denoted as ABC ; AB, BC, CA are the three sides, <A, <B, <C are the three angles and A, B, C are … Read more


1. The word ‘geometry’ comes form the Greek words ‘geo’, meaning the ‘earth’, and ‘metrein’, meaning ‘to measure’. Geometry appears to have originated from the need for measuring land. 2. Theorem 5.1 : Two distinct lines cannot have more than one point in common. Proof : Here we are given two lines l and m. … Read more

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