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

1
What is the measure of a right angle?
Answer
(C)
90°
2
If two lines intersect, forming angles a, b, c, and d, which angles are vertically opposite angles?
Answer
B
D
3
In a parallelogram, what is the relationship between opposite sides?
Answer
(A)
They are equal and parallel.
4
What is the sum of the exterior angles of a convex polygon?
Answer
(C)
360°
5
If the interior angles of a polygon add up to 1080°, how many sides does the polygon have?
Answer
(C)
8
6
Which of the following is a property of an isosceles triangle?
Answer
(C)
Two sides are equal.
7
If a transversal intersects two parallel lines, which of the following angles are equal?
Answer
A
B
D
8
What is the measure of an angle that forms a complete circle?
Answer
(D)
360°
9
If two angles form a linear pair, what is the sum of their measures?
Answer
(C)
180°
10
What is the measure of a straight angle?
Answer
(C)
180°
11
What kind of triangle has no equal sides or angles?
Answer
(B)
Scalene
12
What is the sum of the interior angles in a regular octagon?
Answer
(C)
1080°
13
What do we call angles that are next to each other, sharing a common vertex and side?
Answer
(D)
Adjacent angles
14
If the interior angle of a regular polygon is 150°, how many sides does it have?
Answer
(D)
12
15
Which of these pairs of angles add up to 180°?
Answer
(C)
Supplementary Angles
16
How many degrees are in an obtuse angle?
Answer
(C)
More than 90° but less than 180°
17
If an angle is 110°, what is its supplementary angle?
Answer
(A)
70°
18
Which of the following statements is true about vertically opposite angles?
Answer
(D)
They are equal.
19
If two angles are complementary, what is the sum of their measures?
Answer
(A)
90°
20
Which of the following describes a scalene triangle?
Answer
(D)
No sides are equal.
21
What is the measure of each interior angle of an equilateral triangle?
Answer
(C)
60°
22
What is the measure of an angle that forms a complete revolution?
Answer
(D)
360°
23
What must be true of the two acute angles in a right triangle?
Answer
(B)
They are complementary.
24
If two angles are supplementary and one angle measures 60 degrees, what is the measure of the other angle?
Answer
(C)
120°
25
What is the term for two angles that share a vertex and a common side?
Answer
(D)
Adjacent angles
26
In a parallelogram, the opposite sides are:
Answer
(A)
Equal and parallel
27
In a triangle, the angles are represented by x, 2x, and 3x. What is the value of x?
Answer
(A)
30°
28
If two lines intersect, and one angle is 40 degrees, what is the measure of its vertically opposite angle?
Answer
(A)
40°
29
If an angle and its complement are equal, what is the measure of the angle?
Answer
(B)
45°
30
What is the sum of interior angles of a triangle?
Answer
(B)
180°
31
In a regular polygon, if each interior angle is 135°, how many sides does the polygon have?
Answer
(C)
10
32
What's the sum of exterior angles in a quadrilateral?
Answer
(D)
360°
33
If a quadrilateral has angles of 60°, 120°, and 70°, what is the value of the fourth angle?
Answer
(D)
120°
34
What is the sum of the interior angles of a quadrilateral?
Answer
(C)
360°
35
If a line segment is extended to make a straight line, what is the measurement of the angle created?
Answer
(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?
Answer
(A)
70°
37
What is the sum of the interior angles of a polygon with 5 sides (a pentagon)?
Answer
(C)
540°
38
In a triangle, the angles are in the ratio 2:3:4. What is the largest angle?
Answer
(C)
80°
39
What is the relationship between corresponding angles formed by a transversal and two parallel lines?
Answer
(C)
Congruent
40
Which of these describes a regular polygon?
Answer
(C)
All sides and angles are equal
41
Which type of triangle has all three sides equal?
Answer
(C)
Equilateral
42
In a triangle with angles x, 2x, and 3x, what kind of triangle is it?
Answer
(C)
Right
43
What is always true about vertically opposite angles?
Answer
(C)
They are equal
44
If the interior angle of a regular polygon is 108°, how many sides does the polygon have?
Answer
(B)
5
45
What type of triangle has three equal sides and three equal angles?
Answer
(D)
Equilateral
46
If a line segment divides an angle into two equal parts, what is that line segment called?
Answer
(C)
Bisector
47
What is the sum of the interior angles in a triangle?
Answer
(B)
180°
48
What is the sum of the exterior angles of a triangle?
Answer
(D)
360°
49
Which of the following are properties of parallel lines cut by a transversal?
Answer
A
B
C
50
Which of the following statements is true about the exterior angle of a triangle?
Answer
(D)
It is equal to the sum of the two opposite interior angles.