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Geometric Angle Flashcards

1
Q

What is an acute angle?

A

An angle less than 90 degrees.

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2
Q

What is a right angle?

A

An angle equal to 90 degrees.

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3
Q

What is an obtuse angle?

A

An angle greater than 90 degrees but less than 180 degrees.

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4
Q

What is a straight angle?

A

An angle equal to 180 degrees.

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5
Q

What is a reflex angle?

A

An angle greater than 180 degrees but less than 360 degrees.

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6
Q

What is a full angle?

A

An angle equal to 360 degrees.

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7
Q

What are complementary angles?

A

Two angles whose sum is 90 degrees.

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8
Q

What are supplementary angles?

A

Two angles whose sum is 180 degrees.

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9
Q

What are adjacent angles?

A

Two angles that share a common side and a common vertex.

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10
Q

What are vertical (opposite) angles?

A

Two angles formed by two intersecting lines, opposite each other and equal in measure.

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11
Q

What is an interior angle?

A

An angle formed inside a polygon by two adjacent sides.

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12
Q

What is an exterior angle?

A

An angle formed outside a polygon by extending one of its sides.

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13
Q

What is an angle bisector?

A

A ray that divides an angle into two equal parts.

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14
Q

What is the angle sum property of a triangle?

A

The sum of the angles in a triangle is always 180 degrees.

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15
Q

What is the angle sum property of a quadrilateral?

A

The sum of the angles in a quadrilateral is always 360 degrees.

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16
Q

What is a central angle?

A

An angle whose vertex is at the center of a circle.

17
Q

What is an inscribed angle?

A

An angle formed by two chords in a circle with the vertex on the circle.

18
Q

What is a complementary angle of 30 degrees?

A

60 degrees (since 30 + 60 = 90).

19
Q

What is a supplementary angle of 120 degrees?

A

60 degrees (since 120 + 60 = 180).

20
Q

What is the angle of a regular pentagon?

A

Each interior angle is 108 degrees.

21
Q

What is the angle of a regular hexagon?

A

Each interior angle is 120 degrees.

22
Q

What is the angle of a regular octagon?

A

Each interior angle is 135 degrees.

23
Q

What is a zero angle?

A

An angle that measures 0 degrees.

24
Q

What is the definition of a linear pair of angles?

A

Two adjacent angles that form a straight line.

25
Q

What is a coterminal angle?

A

Angles that share the same initial and terminal sides but differ by multiples of 360 degrees.

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