NCERT solutions for Math - Magic [English] Class 5 chapter 2 - Shapes and Angles [Latest edition]

Mohini made this.

.
Now you give the answers.

Is it a closed shape?

Mohini made this.

Now you give the answers.

Does it have 6 sides?

But it is not the same as the one made by Rohini. So Mohini tried again.

This is what she made.

Is it a closed shape with 6 sides?

But it is not the same as the one made by Rohini. So Mohini tried again.

This is what she made.

Is it the same as the one made by Rohini?

Is there some way to say in what way these shapes are different?

Mohini tried again but got different shapes. Guess and make two more shapes Mohini could have made

Look at the angles marked in these shapes. Can you see the difference?

Look at the shape and answer.

The angle marked in ______ color is the biggest angle.

Are the angles marked with yellow equal?

Are the angles marked with green equal?

Are the angles marked with blue equal?

Four different angles are marked in four colors. Can you find other angles which are the same as the one marked in red? Mark them in red. Do this for other colors.

How many different shapes can you make by changing the angle between the matchsticks in these? Try.

4 matchsticks

8 matchsticks

5 matchsticks

7 matchsticks

10 matchsticks

Make 8 triangles using 6 matchsticks. Try!

Take 8 matchsticks and make a fish like this. Now pick up any 3 matchsticks and put them in such a way that the fish now starts swimming in the opposite direction. Did it?

Using 10 matchsticks make this shape. Pick any 5 matchsticks and put them in such a way that you get the shape of a house.

Go around with your tester and draw here those things in which the tester opens like the letter L. Are you sure they are all right angles?

Look at the angles in the pictures and fill the table.

Angle	Right Angle	More than a right angle	Less than a right angle
			✓

Sukhman made this picture with so many angles.

Use color pencils to mark.

• Right angles with black color.
• Angles that are more than a right angle with green.
• Angles that are less than a right angle with blue.

Draw anything of your choice around the angle shown. Also, write what kind of angle it is. The first one is done.

Collect some leaves from the garden. Color each leaf and print it. Look at the angles on the leaves. Which of them are more/less than a right angle?

Look for the birds which have beaks with small angles.

In the picture mark angles between the two branches. Which two branches have the biggest angle?

Write 3 names using straight lines and count the angles.

Put 10 Math-Magic books on top of each other. Keep one book slanting to make a slide.

Now do this with six books.

• Roll a ball from the top. From which slide does the ball roll down faster?
• Which slide has the smaller angle?

These are two slides in a park.

• Which slide has a larger angle?
• Which slide do you think is safer for the little boy? Why?

Now make these 4, 5, 6 sided shapes by using tube pieces and matchsticks.

Find out how many angles are there in each of these shapes. Mark them.

Now push each shape downwards with the tip of your finger.

Does the angle change when pushed down by the finger? 

Now make these  4, 5, 6 sided shapes by using tube pieces and matchsticks.

Find out how many angles are there in each of these shapes. Mark them.

Now push each shape downwards with the tip of your finger.

Does the angle change when pushed down by the finger?

Find out and write your results in the table given:

Shape	Change in angle Yes/No

Look for triangles in the pictures below.

From the activity ‘Changing Shapes’ can you guess why triangles are used in these towers, bridges, etc.?

Look for triangles in the pictures below.

Look around and find out more places where triangles are used.

There are many times in a day when the hands of a clock make a right angle. Now you draw some more.

Write what kind of angle is made by the hands at these times. Also, write the time.

Draw the hands of the clock when they make an angle that is less than a right angle, Also write the time.

In the picture three points A, B and C are shown. Draw a line to show from which point Kittu should hit to get the queen.

Use your degree clock to measure the right angle of your pencil box ______ is the measure of the right angle.

Can you guess how many degrees is the angle which is:

• `1/2` of a right angle ______
• `1/3` of a right angle ______
• 2 times of a right angle ______

Measure the angles from where Kittu should hit the striker.

Find the angle of 45° and 90° when you open your plane.

Estimate the measure as many angles as you can be made by different parts of the body while doing ‘Asanas’.