Free Lines, Angles and Triangles 02 Practice Test - 5th Grade
Question 1
____ has a starting and an ending point.
A line
A ray
A line segment
A point
SOLUTION
Solution : C
Line segments are lines that are defined with a fixed length between 2 points.
Question 2
A point has ____ dimension(s).
One
Two
Three
No
SOLUTION
Solution : D
A point has zero dimensions. There's no length, height and width associated with it.
Question 3
How many degrees does a minute hand of a clock turn through in one hour?
90∘
180∘
270∘
360∘
SOLUTION
Solution : D
A minute hand of a clock makes a complete revolution in one hour. That is, it turns 360∘ in one hour.
Question 4
Which of the following statements best describes two parallel lines
They meet exactly at one point.
Lines having a uniform distance between them and never meet each other.
They meet exactly at 2 points.
They form a right angle.
SOLUTION
Solution : B
Parallel lines are lines having a uniform distance between them (equidistant) and this distance is constant throughout and never meet each other.
Question 5
Which of the following angles is not less than a straight angle?
Acute angle
Obtuse angle
Right angle
Reflex angle
SOLUTION
Solution : D
A Straight angle = 180∘
An Acute angle is less than 90∘
An obtuse angle is more than 90∘but less than 180∘
A Right angle = 90∘
Reflex angle is the only angle which is greater than 180∘ and less than 360∘
Question 6
A triangle with one obtuse angle is called a/an:
Isosceles triangle
Acute angled triangle
Obtuse angled triangle
Right angled triangle
SOLUTION
Solution : C
A triangle having one of its angles as an obtuse angle is called an Obtuse angled triangle.
In the given triangle,∠ABC is an obtuse angle.
Question 7
How many different angles (less than or equal to 90∘) can you find in the given figure?
SOLUTION
Solution : C
The angles formed are ∠DOC,∠COB,∠BOA,∠DOB,∠COA,∠DOA
SO, a total of 6 angles are formed.
Question 8
Which of the folloiwng sets of angles can form a triangle?
90∘,30∘,90∘
70∘,70∘,70∘
30∘,20∘,110∘
80∘,40∘,60∘
SOLUTION
Solution : D
We know that " Sum of interior angles of a triangle = 180∘
80∘+40∘+60∘=180∘.
The sum of angles in all the other sets is more than 180∘
∴80∘,40∘,60∘ is the correct option.
Question 9
How many obtuse angles can a triangle have?
One
Two
Three
None
SOLUTION
Solution : A
Sum of interior angles in a tringle = 180∘.
An obtuse angle measures more than 90 degrees but less than 180 degrees.
A triangle can have only one obtuse angle because if there were two obtuse angles, then the sum of two obtuse angles would always be greater than 180∘.
Hence, a triangle can have only one obtuse angle.
Question 10
Which of the following is true for the angles shown below?
SOLUTION
Solution : A
The larger is the angle, the more is the steepness of the slope.
Hence, angle a is greater than angle b.
a>b