Represent √7 on number line
Answers
Answer:
With O as centre and radius BH, mark draw an arc and let it intersect the positive x-axis at M. M represents $\sqrt{7}$ on the number line. Hence $\sqrt{7}$ is represented on the number line.
Hint :-
Use the fact that if two sides of a right-angled triangle are and 1, then the
hypotenuse is given by . Hence form a right-angled triangle with sides,
1 and 1. The hypotenuse will be . Then using the length of hypotenuse form
another right-angled triangle with sides, and 1. The hypotenuse of that
triangle will be . Continue in the same way till we get the hypotenuse
length as . Now extend compass length to be equal to (Keep one arm
of the compass on one endpoint of the hypotenuse and the other arm on the
other endpoint of the hypotenuse). Draw an arc with 0 as the center and let it
intersect the positive x-axis at some point. The point then represents on
the number line.
Complete step-by-step answer :-
Consider a right-angled triangle with side length as 1, 1 as shown in fig 1.
Hence BC = =
Draw CD perpendicular to BC and CD = 1 unit as shown in fig 2.
Hence BD = =
Draw CE perpendicular to BD and CE = 1 unit as shown in fig 3.
Hence BE = =
Draw EF perpendicular to BE and EF = 1 unit as shown in fig 4.
Hence BF = =
Draw FG perpendicular BF and FG = 1 unit as shown in fig 5.
Hence BG = =
Draw GH perpendicular BG and GH = 1 unit as shown in fig 6.
Hence BH = =
With O as center and radius BH, draw an arc and let it intersect the
positive x-axis at M as shown in fig 7. M represents on the number line.
Hence is represented on the number line.
Remarks :-
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