Mathematics for IGCSE & O level - Angles (Section 3)

• 1

  What is the measure of a right angle?

  Відповідь

  (C)

  90°
• 2

  If two lines intersect, forming angles a, b, c, and d, which angles are vertically opposite angles?

  Відповідь

  B

  D
• 3

  In a parallelogram, what is the relationship between opposite sides?

  Відповідь

  (A)

  They are equal and parallel.
• 4

  What is the sum of the exterior angles of a convex polygon?

  Відповідь

  (C)

  360°
• 5

  If the interior angles of a polygon add up to 1080°, how many sides does the polygon have?

  Відповідь

  (C)

  8
• 6

  Which of the following is a property of an isosceles triangle?

  Відповідь

  (C)

  Two sides are equal.
• 7

  If a transversal intersects two parallel lines, which of the following angles are equal?

  Відповідь

  A

  B

  D
• 8

  What is the measure of an angle that forms a complete circle?

  Відповідь

  (D)

  360°
• 9

  If two angles form a linear pair, what is the sum of their measures?

  Відповідь

  (C)

  180°
• 10

  What is the measure of a straight angle?

  Відповідь

  (C)

  180°
• 11

  What kind of triangle has no equal sides or angles?

  Відповідь

  (B)

  Scalene
• 12

  What is the sum of the interior angles in a regular octagon?

  Відповідь

  (C)

  1080°
• 13

  What do we call angles that are next to each other, sharing a common vertex and side?

  Відповідь

  (D)

  Adjacent angles
• 14

  If the interior angle of a regular polygon is 150°, how many sides does it have?

  Відповідь

  (D)

  12
• 15

  Which of these pairs of angles add up to 180°?

  Відповідь

  (C)

  Supplementary Angles
• 16

  How many degrees are in an obtuse angle?

  Відповідь

  (C)

  More than 90° but less than 180°
• 17

  If an angle is 110°, what is its supplementary angle?

  Відповідь

  (A)

  70°
• 18

  Which of the following statements is true about vertically opposite angles?

  Відповідь

  (D)

  They are equal.
• 19

  If two angles are complementary, what is the sum of their measures?

  Відповідь

  (A)

  90°
• 20

  Which of the following describes a scalene triangle?

  Відповідь

  (D)

  No sides are equal.
• 21

  What is the measure of each interior angle of an equilateral triangle?

  Відповідь

  (C)

  60°
• 22

  What is the measure of an angle that forms a complete revolution?

  Відповідь

  (D)

  360°
• 23

  What must be true of the two acute angles in a right triangle?

  Відповідь

  (B)

  They are complementary.
• 24

  If two angles are supplementary and one angle measures 60 degrees, what is the measure of the other angle?

  Відповідь

  (C)

  120°
• 25

  What is the term for two angles that share a vertex and a common side?

  Відповідь

  (D)

  Adjacent angles
• 26

  In a parallelogram, the opposite sides are:

  Відповідь

  (A)

  Equal and parallel
• 27

  In a triangle, the angles are represented by x, 2x, and 3x. What is the value of x?

  Відповідь

  (A)

  30°
• 28

  If two lines intersect, and one angle is 40 degrees, what is the measure of its vertically opposite angle?

  Відповідь

  (A)

  40°
• 29

  If an angle and its complement are equal, what is the measure of the angle?

  Відповідь

  (B)

  45°
• 30

  What is the sum of interior angles of a triangle?

  Відповідь

  (B)

  180°
• 31

  In a regular polygon, if each interior angle is 135°, how many sides does the polygon have?

  Відповідь

  (C)

  10
• 32

  What's the sum of exterior angles in a quadrilateral?

  Відповідь

  (D)

  360°
• 33

  If a quadrilateral has angles of 60°, 120°, and 70°, what is the value of the fourth angle?

  Відповідь

  (D)

  120°
• 34

  What is the sum of the interior angles of a quadrilateral?

  Відповідь

  (C)

  360°
• 35

  If a line segment is extended to make a straight line, what is the measurement of the angle created?

  Відповідь

  (C)

  180°
• 36

  If two parallel lines are cut by a transversal, and one of the interior angles on the same side of the transversal is 110°, what is the measure of the other interior angle on the same side?

  Відповідь

  (A)

  70°
• 37

  What is the sum of the interior angles of a polygon with 5 sides (a pentagon)?

  Відповідь

  (C)

  540°
• 38

  In a triangle, the angles are in the ratio 2:3:4. What is the largest angle?

  Відповідь

  (C)

  80°
• 39

  What is the relationship between corresponding angles formed by a transversal and two parallel lines?

  Відповідь

  (C)

  Congruent
• 40

  Which of these describes a regular polygon?

  Відповідь

  (C)

  All sides and angles are equal
• 41

  Which type of triangle has all three sides equal?

  Відповідь

  (C)

  Equilateral
• 42

  In a triangle with angles x, 2x, and 3x, what kind of triangle is it?

  Відповідь

  (C)

  Right
• 43

  What is always true about vertically opposite angles?

  Відповідь

  (C)

  They are equal
• 44

  If the interior angle of a regular polygon is 108°, how many sides does the polygon have?

  Відповідь

  (B)

  5
• 45

  What type of triangle has three equal sides and three equal angles?

  Відповідь

  (D)

  Equilateral
• 46

  If a line segment divides an angle into two equal parts, what is that line segment called?

  Відповідь

  (C)

  Bisector
• 47

  What is the sum of the interior angles in a triangle?

  Відповідь

  (B)

  180°
• 48

  What is the sum of the exterior angles of a triangle?

  Відповідь

  (D)

  360°
• 49

  Which of the following are properties of parallel lines cut by a transversal?

  Відповідь

  A

  B

  C
• 50

  Which of the following statements is true about the exterior angle of a triangle?

  Відповідь

  (D)

  It is equal to the sum of the two opposite interior angles.