Please answer this as soon as possible.

1st one is acute 2nd one is also acute 3rd one is obtuse last one is right

Step-by-step explanation:

Because I learned this already

#1: acute, #2acute,#3 obtuse,#4 right triangle

Step-by-step explanation:

I learned this not that long ago

a line is an defined derm because it

a)contains an infinite number of points b) can be used to create other geometric shapes c)describes something that does not have width or depth d) is a term that does not have a formal definition. a line is an undefined term because it: contains an infinite number of points.