Excercise 13.1Question 1a) simple curves:- (i), (ii), (iii), (v), (vi)b) Simple closed curves:- (iii), (v), (vi)c) polygon:- (iii), (vi)d) Convex polygon: - (iii),e) Concave polygon:- VQuestion 2(a) A convex quadrilateral has two diagonal(b) A regular hexgon has 9 diagonals Question 3(i) 8Sum ot all interior angles $=(2 n-4) \times 90$given noiof sidesof polygon(n) $=8$Som of all interior...
Thursday, April 29, 2021
Monday, April 26, 2021
ML AGGARWAL CLASS 8 Chapter 12 Linear Equations and Inqualities In one Variable Exercise 12.1
Exercise 12.1Question 1(i) $5 x-3=3 x-5$=$5 x=3 x-5+3$=$5 x=3 x-2$=$5 x-3 x=-2$=$2 x=-2$$x=-1$(ii) $3 x-7=3(5-x)$=$3 x-7=15-3 x$=$3 x=15+7-3 x$=$3 x+3 x=22$=$6 x=22$=$x=\frac{22}{6}$Question 2(i) $4(2 x+1)=3(x-1)+7$=$8 x+4=3 x-3+7$=$8 x=3 x-3+7-4$=$8 x-3 x=-3+3=0$$5 x=0 \Rightarrow x=0$(ii) $\begin{aligned} 3(2 p-1)=5-(3 p-2) & \\ 6 p-3=5 &-3 p+2 \\ 6 p=& 5-3 j+2+3 \\ 6 p+3...
Saturday, April 24, 2021
ML AGGARWAL CLASS 8 CHAPTER 11 Factorisation Excercise 11.1
Excercise 11.1Solution 1(i) $8 x y^{3}+12 x^{2} y^{2}$H.C.F of $8 x y^{3}$ and $12 x^{2} y^{2}$ is $4 x y^{2}$$\therefore$ Divide each expression by $4 x y^{2}$ and keep $4 x y^{2}$outside the bracket.$\Rightarrow \quad 4 x y^{2}(2 y+3 x)$$\therefore 8 x y^{3}+12 x^{2} y^{2}=4 x y^{2}(2 y+3 x)$(ii) $15 a x^{3}-9 a x^{2}$H.C.F of exprassion $15 a x^{3}$ and $9 a x^{2}$ is $3 a...
