Find the value of y in the following figures:
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Find the value of y in the following figures:
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Answer:
i)y=345° ii)y=65° iii)y=90°
Step-by-step explanation:
i)360°=y+15°
⇒y=360°-15°
⇒y=345°
ii)360°=(2y+10)°+50°+40°+130°
⇒360°=(2y+10)°+220°
⇒(2y+10)°=360°-220°
⇒(2y+10)°=140°
⇒2y=140°-10°
⇒2y=130°
⇒y=130/2
⇒y=65°
iii)360°=y+40°+140°+50°
⇒360°=y+270°
⇒y=360°-270°
⇒y=90°
Step-by-step explanation:
I) y+15=360
y=360-15
y= 345
ii) 2y+10+50+40+130=360
2y+230=360
2y=360-230
2y=130
y = 130÷2
y=65
iii) y+40+140+90=360
y+270=360
y =360-270
y=90