Question

Using a = 15, b =12 and
c = 21, is triangle ABC
a right angle triangle?
Yes
No

Answer 1

Answer:

$15^{2}+12^{2}=21^{2}\\225+144=441\\369=441$

left side is not equal to the right. It means that is not right triangle

Step-by-step explanation:

Answer 2

No, triangle ABC is a right angle triangle.

What is triangle ?

Triangle is a two dimensional shape having three side and sum of all angles is equals to $180^0$.

We have,

$a=15$,  $b=12$ and  $c=21$

So,

To be a right angle triangle it must satisfy the Pythagoras triangle.

i.e.

$H^2=P^2+B^2$

So,

$21^2=15^2+12^2$

$441=225+144$

$441\neq 369$

So, triangle ABC is not a right angle triangle as it does not satisfy the Pythagoras triangle.

Hence, we can say that No, triangle ABC is a right angle triangle.

To know more about triangle click here

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