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Question 1: Area of a sector of a circle is 1/6 to the area of circle. Find the degree measure of its minor arc.
Asked by: mansi on 10 January 2012 07:54
Solution:
Question 2: If the diameter of a semi circle protractor is 14 cm. Find its perimeter.
Asked by: mansi on 10 January 2012 07:54
Solution:
Diameter of semicircle protractor = 14cm
Question 1: Area of a sector of a circle is 1/6 to the area of circle. Find the degree measure of its minor arc.
Asked by: mansi on 10 January 2012 07:54
Solution:
Since, Area of sector = 1/6 of Area of circle
Therefore, r2/ 360 = 1/6 * r2
/ 360 = 1/6
6/ 360 = 1/
1/ 60 = 1/
= 60
So, the degree measure of its minor arc = 60 Question 2: If the diameter of a semi circle protractor is 14 cm. Find its perimeter.
Asked by: mansi on 10 January 2012 07:54
Solution:
Diameter of semicircle protractor = 14cm
radius = 14/ 2 = 7cm
Perimeter of semicircle protractor = r + 2r
Area = 22/ 7 * 7 + 2(7)
Area= 22 + 14
Area = 36cm
Therefore, perimeter of semicircle protractor = 36cm
Question3:If the pth term of an A.P. us q, and the qth term is p, show that rth term is p + q - r
Question3:If the pth term of an A.P. us q, and the qth term is p, show that rth term is p + q - r
Asked by Raman Singh on Feb 1, 2012 05:22 AM
Solution:
a+(p-1)d=q
a+(q-1)d=p
by solving these equations we will get, (p-q)d=q-p
d=q-p/p-q
d= -1
now, a=q+p-1
a+(r-1)d=q+p-1+(r-1)-1
=q+p-r
Hence proved!
