Ex 14.2, 4 Given (π΄π΅) Μ of length 3.9 cm, construct (ππ) Μ such that the length of (ππ) Μ is twice that of (π΄π΅) Μ . Verify by measurement. (Hint : Construct (ππ) Μ such that length of (ππ) Μ = length of(π΄π΅) Μ ; then cut off (ππ) Μ also has the length of (π΄π΅) Μ .)
We are given
(π΄π΅) Μ of length 3.9 cm
We need to draw
(ππ) Μ = 2 Γ (π΄π΅) Μ
Letβs follow these steps
1. Draw a line l
mark point P on it
2. Measure (π΄π΅) Μ = 3.9 cm using compass
3. Now keeping compass opened the same length.
We keep pointed end at point P,
and draw an arc on line l
So, (ππ) Μ = 3.9 cm.
4. Now keeping compass opened the same length.
We keep pointed end at point X,
and draw an arc on line l
So, (ππ) Μ = 3.9 cm.
And (ππ) Μ = 7.8 cm
Thus, (ππ) Μ is twice that of (π΄π΅) Μ

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.

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