Question

Find PR In triangle LMN, angle L = 54°, angle M = 36º. Is A LMN a right angled triangle? ​

Answer 1

Step-by-step explanation:

A right triangle is a triangle with one angle that is exactly 90o.

And one of the two angles is 78o. 

Let the other angle be x.

Sum of the angles 180o.

90o+78o+x=180o

x=180o−168o

The other angle =12o

Answer 2

Answer:

yes

180-(54+36)=x

x=90