Which of the following can be the possible lengths (in cm) of a triangle ?
3.9, 3.9, 3.9

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Solution

Yes, it can be length of a triangle because all the length of sides are equal.
An equilateral triangle is a triangle in which all three sides have the same length.

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Question 20
Which of the following sets of triangles could be the lengths of the sides of a right-angled triangle?
a) 3 cm, 4 cm, 6 cm
b) 9 cm, 16 cm, 26 cm
c) 1.5 cm, 3.6 cm, 3.9 cm
d) 7 cm, 24 cm, 26 cm

Q. (1) Using the symbol of congruence, write the names of the congruent line segments.
l (HD) = 3.9 cm, l (ST) = 5.4 cm, l (FA) = 8.2 cm, l (XR) = 8.2 cm, l (FC) = 3.9 cm and l (DI) = 5.4 cm

Q. Arrange the following data in descending order:
3.3, 3.2, 3.1, 3.7, 3.6, 4.0, 3.5, 3.9, 3.8, 4.1, 3.5, 3.8, 3.7, 3.9 and 3.4
Determine the range

Q. Given

¯ A B = 3.9

cm,construct

¯ P Q

such that the length of

¯ P Q

is twice that of

¯ A B

Q. Arrange the following in increasing order:

4.5, 5.7, 2.1, 3.9

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Which of the following can be the possible lengths (in cm) of a triangle ?3.9, 3.9, 3.9

Yes, it can be length of a triangle because all the length of sides are equal.An equilateral triangle is a triangle in which all three sides have the same length.

Which of the following can be the possible lengths (in cm) of a triangle ?
3.9, 3.9, 3.9

Yes, it can be length of a triangle because all the length of sides are equal.
An equilateral triangle is a triangle in which all three sides have the same length.