Question

Find the measure of the angle formed between the base of the cone and a line segment that represents the slant height.

Answer 1

Explanation:

tan Ф = opposite / adjacent

Ф = arctan ( 2 / 6)

Ф = 18.4349° ( this is the angle opposite of the one wanted, or ∠C)

then

180 = 90+ 18.4349° +∠A

71.565 = ∠A