Q1.Simplify the following expressions: (i) (4 + √7) (3 + √2)(ii) (√5 – √3)2(iii) (√5 -2)( √3 – √5) Sol.  […]

Question 1. Find the mean of: 10, 90, 20, 80, 30 and 70. Solution: Number of observations = 6 Sum of the

Q1. If the circumference of the base of a right circular cylinder is 110 cm, then find its base area. Solution: Let

Q1. Find the area of a triangle whose sides are 8 cm, 10 cm, and 12 cm. Sol: Let the

Question 1. The diameter of circle is 3.8 cm. Find the length of its radius. Solution: Since, the diameter of circle is

Q1: In the adjoining figure, if ∠ B = 68°, then find ∠ A, ∠ C and ∠ D.  Solution: Because

Q1: In the given figure, AD = BC and BD = AC, prove that ∠DAB = ∠CBAAns:In ∆DAB and ∆CBA,

Q.1. If P, Q, and R are three collinear points, then name all the line segments determined by them. Ans.

Q1:In the given figure, name the following :(i) Four collinear points(ii) Five rays(iii) Five line segments(iv) Two-pairs of non-intersecting line

Question 1. Is (3, 2) a solution of x + y = 6?Solution: (3, 2) means x = 3 and y