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