given: ∠1 ≅ ∠2

prove: a ∥ b

what is the missing statement in the proof?

∠1 ≅ ∠4

a ∥ b

∠1 ≅ ∠2

a ⊥ b

step-by-step explanation:

this is not a question

6 equilateral triangles

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