# Free Lines, Angles and Triangles 02 Practice Test - 5th Grade

____ has a starting and an ending point.

A.

A line

B.

A ray

C.

A line segment

D.

A point

#### SOLUTION

Solution : C

Line segments are lines that are defined with a fixed length between 2 points.

A point has ____  dimension(s).

A.

One

B.

Two

C.

Three

D.

No

#### SOLUTION

Solution : D

A point has zero dimensions. There's no length, height and width associated with it.

How many degrees does a minute hand of a clock turn through in one hour?

A.

90

B.

180

C.

270

D.

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.

Which of the following statements best describes two parallel lines

A.

They meet exactly at one point.

B.

Lines having a uniform distance between them and never meet each other.

C.

They meet exactly at 2 points.

D.

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.

Which of the following angles is not less than a straight angle?

A.

Acute angle

B.

Obtuse angle

C.

Right angle

D.

Reflex angle

#### SOLUTION

Solution : D

A Straight angle = 180
An Acute angle is less than 90
An obtuse angle is more than 90but less than 180
A Right angle = 90
Reflex angle is the only angle which is greater than 180 and less than 360

A triangle with one obtuse angle is called a/an:

A.

Isosceles triangle

B.

Acute angled triangle

C.

Obtuse angled triangle

D.

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. How many different angles (less than or equal to 90) can you find in the given figure? A. 3
B. 4
C. 6
D. 5

#### SOLUTION

Solution : C

The angles formed are DOC,COB,BOA,DOB,COA,DOA
SO, a total of 6 angles are formed. Which of the folloiwng sets of angles can form a triangle?

A.

90,30,90

B.

70,70,70

C.

30,20,110

D.

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.

How many obtuse angles can a triangle have?

A.

One

B.

Two

C.

Three

D.

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.

Which of the following is true for the angles shown below? A. a>b
B. a<b
C. a=b
D. a+b=90

#### 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