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Now that a learner knows Class 7 Maths Ch 10 Ex 10.1 Java how to draw a line segment and a perpendicular line, this chapter will add to what they have already leant. Parallel lines are those lines that do not intersect and always stay at the same distance from each other.
A student should know how to construct parallel lines. It is imperative, especially in the field of architecture where the architects need to draw the blueprints of buildings. So here is how two exact parallel lines can be drawn. Two lines that are parallel in a plane should not intersect even if those lines are extended till infinity in any of the directions.
The distance between the two lines stays the same throughout. To construct a parallel line, a student needs specific tools like a ruler and a compass. You also need a line segment AB and a point P outside the line from where the parallel lines need to be drawn. Choose any point on the line segment AB and then join this point to the outside point P. Use X as the centre and with any radius that is suitable, draw an arc that cuts the line segment PX. Now use P as the centre and using the same radius used in the first case draw an arc.
Use Q as the centre and with the same radius used before drawing an arc that cuts the arc EF at the point R. Now join R and P, and this gives the line segment CD. The line segment is the parallel line that is required, and it passes through the point P. Exercise Before you proceed to this Class 7 Chapter 10 Maths section, you should first recall the properties of triangles and the congruence of triangles. Triangles are classified on the bases of sides or their angles.
Here are some essential features of triangles. The exterior angle of any triangle is the sum of the interior and the opposite angles.
The three angles of any triangle total to degrees. The sum of any two sides of the triangle is greater than the length of the third side. If the triangle is a right-angled triangle, then the hypotenuse square is equal to the sum of the length square and the breadth square.
The chapter on the Congruence of Triangles shows how a triangle can be drawn if any of these measurements are provided:. All three sides. Two sides and the angles that lie between them. Value of two angles and side that stays between them. The hypotenuse and the size of the length of a right-angled triangle.
It is possible to construct a triangle when all the three sides of the triangle are known. The tools required for this are a ruler and a compass. When all three sides have been provided, the students first need to identify the longest measure of the side, which is given.
Make this as the base of the triangle. Then join the arc intersection with the endpoints of the base and get the triangle required. This Practical Geometry Class 7 PDF section explains how to construct a triangle when the two sides and the angle are provided.
The tools needed for this are a ruler and a compass. To construct a triangle with the SAS provided, here is what needs to be done. Here, the two sides and the angle enclosed between them have been provided. We are working to make Tiwari Academy more user friendly for this academic session Class 7 Maths Chapter 10 all Exercises Solution.
Download App for Class 7 Solutions. Through C, draw a line parallel to AB using ruler and compasses only. To construct: A line, parallel to given line by using ruler and compasses. Join JC to draw a line l. It is the required XYZ. Justify your answer.
Chapter Perimeter and Area �.
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