Question 40

Fill in the blanks to make the statements true.

A $45^{0} - 45^{0} - 90^{0}$ set square has ___ line/lines of symmetry.

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Solution

Since a $45^{0} - 45^{0} - 90^{0}$ set square has a shape of an isosceles triangle and an isosceles triangle has one line of symmetry as shown below.

Hence, a $45^{0} - 45^{0} - 90^{0}$ set square has one line/lines of symmetry.

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45^{0} - 45^{0} - 90^{0}

Question 57

State whether the statements are true or false:

A $45^{0} - 45^{0} - 90^{0}$ set square and a protractor have the same number of lines of symmetry.

45^{0} - 45^{0} - 90^{0}

45^{0} - 45^{0} - 90^{0}

Question 15

Out of the given four options, only one is correct. Write the correct answer.

The number of lines of symmetry in a $45^{0} - 45^{0} - 90^{0}$ set square is

(a) 0 (b) 1 (c) 2 (d) 3

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