7
edits
Changes
Jump to navigation
Jump to search
Line 115:
Line 115: − = TRIANGLES = − − − Mark three − non-collinear point P, Q and R on a paper. Join these pints in − allpossible ways. The segments are PQ, QR and RP. A simple close − curve formed by these three segments is called a triangle. It is − named in one of the following ways. − − Triangle PQR or − Triangle PRQ or Triangle QRP or Triangle RPQ or Triangle RQP . − − − [[Image:KOER%20Triangles_html_m55b3a2cf.png|picture of equilateral triangle]] PQR − − A triangle is one of the basic shapes of geometry: − a polygon with three corners or vertices and three sides or edges − which are line segments. − − − In fact, it is the − polygon with the least number of sides. − − − A triangle PQR − consists of all the points on the line segment PQ,QR and RP. − − − The three line segments, PQ, QR and RP that form − the triangle PQ, are called the sides of the triangle PQR. − − − '''Angles: ''' − − − A triangle has three angles. In figure, the three − angles are ∠PQR ∠QRP and ∠RPQ − − − '''Parts of triangle:''' − − − A triangle has six parts, namely, three sides,PQ − QRand RP.Three angles ∠PQR ∠QRP and ∠RPQ. These are also known − as the elements of a triangle. − − − '''Vertices of a Triangle ''' − − − The point of − intersection of the sides of a triangle is known as its vertex. In − figure, the three vertices are P, Q and R. In a triangle, an angle is − formed at thevertex. Since it has three vertices, so three angles are − formed. The word triangle =tri + angle ‘tri’ means three. So, − triangle means closed figure of straight lines having three angles. − − − − == Evaluation == − − == Self-Evaluation ==
→TRIANGLES
Create a new page and type <nowiki>{{subst:Math-Content}}</nowiki> to use this template
Create a new page and type <nowiki>{{subst:Math-Content}}</nowiki> to use this template
== Further Explorations ==
== Further Explorations ==