EASY

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$115^{°}$ is an obtuse angle.

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Important Questions on Understanding Elementary Shapes

MEDIUM

Mathematics>Geometry>Understanding Elementary Shapes>Types of Angles

The wheels of a car are of diameter $80 c m$ each. How many complete revolutions does each wheel make in 10 minutes when the car is traveling at a speed of $66 k m$ per hour? $(use π = \frac{22}{7})$

MEDIUM

Mathematics>Geometry>Understanding Elementary Shapes>Types of Angles

On a clock, there are two instants between

12

noon and

1

PM, when the hour hand and the minute hand are at right angles. The difference in minutes between these two instants is written as

a + \frac{b}{c},

where

a, b and c

are positive integers, with

b < c

and

\frac{L}{c}

in the reduced form. What is the value of

a + b + c ?

EASY

Mathematics>Geometry>Understanding Elementary Shapes>Types of Angles

In the given figure, $A B ∥ C D, ∠ A B O = 40 °$ and $∠ C D O = 35 °$ . Then the value of $x$ will be

Question Image

EASY

Mathematics>Geometry>Understanding Elementary Shapes>Types of Angles

Write the perimeter of semicircle of radius

r

MEDIUM

Mathematics>Geometry>Understanding Elementary Shapes>Types of Angles

Draw a circle of radius

3 cm

. Mark a point

7 cm

away from its centre. Draw the tangents to the circle from this point.

EASY

Mathematics>Geometry>Understanding Elementary Shapes>Types of Angles

If the ratio of the area of two circles is

9 : 16

, then the ratio of their circumference _____.

EASY

Mathematics>Geometry>Understanding Elementary Shapes>Types of Angles

Only one circle can be drawn through three non collinear points.

EASY

Mathematics>Geometry>Understanding Elementary Shapes>Types of Angles

If the sum of two angles is _____, then they are called supplementary

EASY

Mathematics>Geometry>Understanding Elementary Shapes>Types of Angles

Find the angle which is equal to its supplement.

EASY

Mathematics>Geometry>Understanding Elementary Shapes>Types of Angles

In the following figure, is $∠ 1$ adjacent to $∠ 2$ ? Give reasons.

Question Image

EASY

Mathematics>Geometry>Understanding Elementary Shapes>Types of Angles

Can two angles be supplementary if both of them are acute?

EASY

Mathematics>Geometry>Understanding Elementary Shapes>Types of Angles

In the given figure, $A O B$ is a straight line and the ray $O C$ stands on it. If $∠ A O C = 64 °$ and $∠ B O C = x °$ , find the value of $x$ .

Question Image

EASY

Mathematics>Geometry>Understanding Elementary Shapes>Types of Angles

Using only a ruler, draw an acute angle, an obtuse angle and a straight angle.

EASY

Mathematics>Geometry>Understanding Elementary Shapes>Types of Angles

Among two supplementary angles, the measure of the larger angle is

36 °

more than the measure of the smaller. Find their measures.

EASY

Mathematics>Geometry>Understanding Elementary Shapes>Types of Angles

What is the measure of a right angle?

EASY

Mathematics>Geometry>Understanding Elementary Shapes>Types of Angles

In Fig, the sides

B C, C A

and

B A

of a

△ A B C

have been produced to

D, E

and

F

respectively. If

∠ A C D = 105 °

and

∠ E A F = 45 °

. Find all the angles of the

△ A B C

EASY

Mathematics>Geometry>Understanding Elementary Shapes>Types of Angles

If an angle equals two-third of its supplementary, then the measurement of the angle is:

EASY

Mathematics>Geometry>Understanding Elementary Shapes>Types of Angles

Write down the measures of some acute angles.(Give at least two examples of each)

EASY

Mathematics>Geometry>Understanding Elementary Shapes>Types of Angles

Can two angles be supplementary if both of them are acute?

EASY

Mathematics>Geometry>Understanding Elementary Shapes>Types of Angles

An angle which is greater than

180^{o}

but less than

360^{o}

is known as

115° is an obtuse angle.

Important Questions on Understanding Elementary Shapes

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$115^{°}$ is an obtuse angle.