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