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Answer :

The measure angles of triangle (a) are : 30°, 60° and 90°.

The measure angles of triangle (b) are 45°, 45° and 90°.

Yes, they have a common angle of measure 90°.

- Q.1 Which of the following are models for perpendicular lines: (a) The adjacent edges of a table top. (b) The lines of a railway track. (c) The line segments forming the letter ‘L’. (d) The letter V.
- Q.2 Let \(\overline {PQ} \)be the perpendicular to the line segment\(\overline {XY} \). Let\(\overline {PQ} \)and \(\overline {XY} \) intersect at in the point A. What is the measure of \(\angle \)PAY?
- Q.4 Study the diagram. The line l is perpendicular to line m (a) Is CE = EG? (b) Does PE bisect CG? (c) Identify any two line segments for which PE is the perpendicular bisector. (d) Are these true? (i) AC > FG (ii) CD = GH (iii) BC < EH.

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- NCERT solutions for class 6 maths chapter 5 Understanding Elementary Shapes
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