Which best explains why the orthocenter of an obtuse triangle is outside the triangle?

a. all three of the altitudes lie entirely outside the triangle.
b. two of the altitudes lie entirely outside the triangle.
c. all three of the medians lie entirely outside the triangle.
d. two of the medians lie entirely outside the triangle.

A is the right answer.All three of the altitudes lie entirely outside the triangle.

Step-by-step explanation:

Orthocenter of a triangle is a point which formed by intersection of all the three concurrent altitudes. It can be inside or outside of a triangle. In obtuse triangle All three of the concurrent altitudes lie entirely outside the triangle .Therefore its intersection will lie outside and that intersection is orthocenter of the obtuse triangle .

in the attachment.   i didn't see your choices.   the word which means there is choices.

step-by-step explanation:

(x,y)

x tells you how much left or right you go from the origin

y tells you how much down or up you go from the origin

so for example (-3,2), you go left 3 and up twice. i denoted which of the ordered pairs is which in my graph.

for this case we have that by definition, the surface area of a cylinder is given by:

where:

r: it is the radius of the cylinder

h: it is the height of the cylinder

we can also rewrite it as:

where:

la: it's the lateral area

ba: area of the base

option a