Exemplar Exercise Problems I — task. Mathematics CBSE, Class 9.

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1. In Fig., if \(AB || CD || EF\), \(PQ || RS\), \(∠RQD = 25^°\) and \(∠CQP = 60^°\), then \(∠QRS\) is equal to

YCIND_240306_6084_lines and angles_5.png

\(85^{\circ}\)
\(110^{\circ}\)
\(145^{\circ}\)
\(135^{\circ}\)

2. If one angle of a triangle is equal to the sum of the other two angles, then the triangle is

an isosceles triangle
an obtuse triangle
a right triangle
an equilateral triangle

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