book Maths Puzzle Numerical Ability

it is possible for two lines to intersect in such a way that three of the angles formed have measures of 20, 70, 20. true or false

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book Other Question

CAN SOMEONE TEACH ME HOW TO DO LINEAR INEQUALITIES?
like - how do i find a boundry of a line?
ex. y>x y=____
write the equation of the given conics in standard form via completion of the square:
1) Y^2-12X-8X+20=0
2) 16X^2-16Y^2-4X-28Y+66=0

THANK YOU