Shapes and Angles Test 7

Result

Shapes and Angles Test 7

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Weekly Quiz Competition

Question 1
1 / -0

If the sum of two angles is an obtuse angle, then which of the following is not possible :

A
two acute angles

B
one obtuse angles one acute angle

C
two acute angles

D
two right angles

Solution

Two right angles (d), as the sum will result in a straight angle, which is not obtuse.
Question 2
1 / -0

In given figure which one of the following angle is a straight angle

A
$$\angle AOB$$

B
$$\angle AOD$$

C
$$\angle BOC$$

D
$$\angle BOD$$

Solution

Straight angle is equal to $$180^o$$.
So, $$\angle BOD$$ and $$\angle AOC$$ are straight angles.
Question 3
1 / -0

The angle formed by the pages of an open book is:

A
Acute

B
Obtuse

C
Right

D
Straight

Solution

The angle formed by the pages of an open book is obtuse.
Since the angle will always be more than $$90$$ but less than $$180$$.
Question 4
1 / -0

A reflex angle is .........a straight angle.

A
Smaller than

B
Larger than

C
Equal to

D
One-half of

Solution
Question 5
1 / -0

Line $$\text{AD}$$ and the point $$\text{R}$$ lie in the same plane.

A
True

B
Flase

C
Data is insufficient

D
None of the above
Question 6
1 / -0

Which of the following is an obtuse angle ?

A
$$92^\circ$$

B
$$181^\circ$$

C
$$195^\circ$$

D
$$83^\circ$$

Solution
Question 7
1 / -0

The sum of two acute angles can be:

A
Acute angles

B
Obtuse angles

C
Right angles

D
All of the above

Solution

Let one angle is $$\displaystyle { 30 }^{ o }$$ and the other angle is $$\displaystyle { 40 }^{ o }$$ then sum is $$\displaystyle { 70 }^{ o }$$. which is an acute angle.
Let one angle is $$\displaystyle { 70 }^{ o }$$ and other angle is $$\displaystyle { 80 }^{ o }$$, then sum is $$\displaystyle { 150 }^{ o }$$ which is a obtuse angle.
Let one angle is $$\displaystyle { 45 }^{ o }$$ and another angle is $$\displaystyle { 45 }^{ o }$$ then sum is $$\displaystyle { 90 }^{ o }$$ which is a right angle.

So correct answer is $$(D)$$
Question 8
1 / -0

When the clock shows time $$5:20$$, the angle formed between the two hands is

A
obtuse

B
right

C
acute

D
none of these

Solution

Angles

between $$ {0}^{o} $$ and $$ {90}^{o} $$ are acute angles.

Since at the time $$ 5:20$$, the hands of the clock form an angle less than $$ {90}^{o} $$, the angle formed between the two hands is an acute angle.
Question 9
1 / -0

What type of angle is angle X?

A
Acute

B
Obtuse

C
Right

D
Straight

Solution
Question 10
1 / -0

How many angles are less than $$90^o$$ inside the given figures?

A
$$2$$

B
$$3$$

C
$$4$$

D
$$5$$

Solution

Given,
Refer Fig.
Here $$\angle ABF,\angle BFC$$ and $$\angle FCD$$ is less than $$90^0$$.
So total $$3$$ angles are $$<90^0$$
option B is correct.