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Rotational Symmetry

Fill in the b...

Question

Fill in the blanks :
The angle by which an object rotates is called the angle of ________.

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Solution

The angle by which an object rotates is called the angle of rotation.

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Question 22

Fill in the blanks to make the statements true.

In the given figure,

a) $∠ A O D$ is a/an______angle.

b) $∠ C O A$ is a/an______angle.

c) $∠ A O E$ is a/an______angle.

Q. Fill in the blanks:

(i) A right triangle cannot have an ...... angle.
(ii) The acute angles of a right triangle are ...... .
(iii) Each acute angle of an isosceles right triangle measures ...... .
(iv) Each angle of an equilateral triangle measures ...... .
(v) The side opposite the right angle of a right triangle is called ...... .
(vi) The sum of the lengths of the sides of a triangle is called its...... .

Q. Fill in the blanks.

(1) The two segments of a circle made by a diameter are called ....... .
(2) The measure of an angle in a semi-circular region is ......... degrees.
(3) All points on a circle and all points in the interior of a circle together form the ....... .

Q. Fill in the blanks:
(i) A polygon is a simple closed figure formed by more than ...... line segments.
(ii) A polygon formed by three line segments is called a ....... .
(iii) A polygon formed by four line segments is called a ...... .
(iv) A triangle has ...... sides and ...... angles.
(v) A quadrilateral has ...... sides and ...... angles.
(vi) A figure which ends at the starting point is called a .......... .

Fill in the blank with acute, obtuse, right, reflex or straight angle.

When one of the angles, which is less than a right angle is added to a right angle it forms a/an ____________ .

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