Mathematics

# Calculate the value of $x :$

##### SOLUTION
(a) straight line
$\Rightarrow 2x+3x= 180^{\circ}$
$5x= 180^{\circ}$
$x= 36^{\circ}$

(b) Right angle
$\Rightarrow 5x+4x= 90^{\circ}$
$9x= 90^{\circ}$
$x= 10$

$(c) 2x+x+4x+3x= 360^{\circ}$
$10x= 360^{\circ}$
$x= 36$

$(d) 3x-5+x+20+65^{\circ}= 180^{\circ}$
$4x+80= 180^{\circ}$
$4x=100$
$x= 25$

$(e)2x+x+60+2x= 360$
$5x=300$
$x= 60^{\circ}$

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Subjective Medium Published on 09th 09, 2020
Questions 120418
Subjects 10
Chapters 88
Enrolled Students 86

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