wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

The sides of certain triangles are given below. Determine which of them are right triangles.

(i) a = 7 cm, b = 24 cm and c = 25 cm
(ii) a = 9 cm, b = 16 cm and c = 18 cm
(iii) a = 1.6 cm, b = 3.8 cm and c = 4 cm
(iv) a = 8 cm, b = 10 cm and c = 6 cm

Open in App
Solution

(i) Let

In order to prove that the given sides of a certain triangle forms a right angled triangle we have to prove that square of the larger side is equal to the sum of the squares of the other two sides.

Here, the larger side is.

Hence, we have to prove that.

Let solve the left hand side of the above equation.

Now we will solve the right hand side of the equation,

Here we can observe that left hand side is equal to the right hand side that is .

Therefore, the given sides of a certain triangle form a right angled triangle.

(ii) Let

In order to prove that the given sides of a certain triangle forms a right angled triangle we have to prove that square of the larger side is equal to the sum of the squares of the other two sides.

Here, the larger side is .

Hence, we have to prove that.

Let solve the left hand side of the above equation.

Now we will solve the right hand side of the equation,

Here we can observe that left hand side is not equal to the right hand side.

Therefore, the given sides of a certain triangle do not form a right angled triangle.

(iii) Let

In order to prove that the given sides of a certain triangle forms a right angled triangle we have to prove that square of the larger side is equal to the sum of the squares of the other two sides.

Here, the larger side is .

Hence, we have to prove that.

Let solve the left hand side of the above equation.

Now we will solve the right hand side of the equation,

Here we can observe that left hand side is not equal to the right hand side.

Therefore, the given sides of a certain triangle do not form a right angled triangle.

(iv) Let

In order to prove that the given sides of a certain triangle forms a right angled triangle we have to prove that square of the larger side is equal to the sum of the squares of the other two sides.

Here, the larger side is .

Hence, we have to prove that .

Let solve the left hand side of the above equation.

Now we will solve the right hand side of the equation,

Here we can observe that left hand side is equal to the right hand side that is .

Therefore, the given sides of a certain triangle form a right angled triangle.


flag
Suggest Corrections
thumbs-up
1
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Pythogoras Theorem
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon