Chapter 11.3, Problem 1MC

To determine

a.

To explain:

Whether another angle of a triangle can also be obtuse if one angle is already obtuse.

To determine

b.

To explain:

Whether other two angles of a triangle can also be acute if one angle is already acute.

To determine

c.

To find:

Whether the triangle is necessarily acute if a triangle has one acute angle and explain it.

To determine

d.

To find:

Whether two angles of a triangle can be supplementary or not and state the reason behind it.