# NCERT Solutions for Class 7 Maths Chapter 6 The Triangle and its Properties Ex 6.1

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## NCERT Solutions for Class 7 Maths Chapter 6 The Triangle and its Properties Ex 6.1

NCERT TEXTBOOK EXERCISES

Question 1. In ∆PQR, D is the mid-point of $\overline { QR }$.

Solution:

$\overline { PM }$ is the altitude.
PD is the median.
No! QM ≠ MR.

Question 2. Draw rough sketches for the following:

(a) In ∆ ABC, BE is a median.
(b) In ∆ PQR, PQ and PR are altitudes of the triangle.
(c) In ∆ XYZ, YL is an altitude in the exterior of the triangle.

Solution:

Question 3. Verify by drawing a diagram if the median and altitude of an isosceles triangle can be the same.

Solution:

AL is the altitude.

Draw a line segment BC. By paper folding, locate the perpendicular bisector of BC. The folded crease meets BC at D, its mid-point.
Take any point A on this perpendicular bisector. Join AB and AC. The triangle thus obtained is an isosceles ∆ABC in which AB = AC.
Since D is the mid-point of BC, so AD is its median. Also, AD is the perpendicular bisector of BC. So, AD is the altitude of ∆ABC.
Thus, it is verified that the median and altitude of an isosceles triangle are the same.

## NCERT Solutions for Class 7 Maths Chapter 6 The Triangle and its Properties Ex 6.1 PDF

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