1. Give the formulae or unit of:
1. Surface Area of a cuboid =2(lb+bh+hl) Page 210
2. Surface Area of a cube =6a2 Page 211
3. Curved Surface Area of a Cylinder = 2πrh Page 215
4. Total Surface Area of a cylinder =2πr(r+h) Page 215
5. Volume of a cube = edge x edge x edge=a3 Page 227
2. The sum of the angles of a quadrilateral is _________. Page 137
Answer: 3600
3.What is Circle ? Page 169
Answer:
The collection of all the points in a plane, which are at a fixed distance from a fixed point in the plane, is called a circle.
4. What is an arc? Page 170
Answer:
A piece of a circle between two points is called an arc.
5.What is segment? Page 170
Answer:
The region between a chord and either of its arcs is called a segment.
6.What is circumference? Page 170
Answer:
The length of a complete circle is called its circumference.
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