# 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.

In the given figures, the triangle with angle a has a steeper slope as compared to the triangle with angle b.

Hence, angle a is greater than angle b.

a>b