Are the triangles below acute obtuse or right

triangle A is a right triangle

triangle B is a acute triangle

triangle C is a obtuse triangle

triangle D is a right triangle

A & D is right triangle

And C&B is obtuse triangle

the answer is:

the correct option is the option b.

to calculate the surface area of the right cylinder, we need to use the following formula:

from the picture we know that:

so, substituting and calculting we have:

hence, we have that the correct option is the option b.

have a nice day!