Class 6 - Mathematics : Understanding Elementary
Exercise : 5.5
Top Block 1
NCERT Solutions Class 6 Mathematics Understanding Elementary Ex 5.5
Question: 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.
Answer :
(a) Perpendicular
(b) Not perpendicular
(c) Perpendicular
(d) Not perpendicular
Question: 2 Let PQ be the perpendicular to the line segment XY. Let PQ and XY intersect in the point A. What is the measure of ∠PAY.
Answer :
∠PAY = 90°
Question: 3.There are two “set-squares” in your box. What are the measures of the angles that are formed at their corners? Do they have any angle measure that is common?
Answer :
One set-square has 45°,90°,45° and other set-square has 60°,90°,30°. They have 90° as common angle.
Question: 4
Study the diagram. The line l is perpendicular to line m.
Mddle block 1
(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
Answer :
(a) Yes, both measure 2 units.
(b) Yes, because CE = EG
(c) DF and CG,
BH
(d)
(i) True,
(ii) True,
(iii) True