Step-by-step explanation:
Property: 
<u />
<u>Use the Distributive Property:</u>
<u />
6g + 18 is an equivalent expression when the distributive property is used.
The formula for the lateral surface area of a right circular cone is:

where r is the radius of the base, and l is the slant height.
Plugging in the values we get:
Answer:
Step-by-step explanation:
The two triangles are congruent.
∠L ≅ ∠ B Given
LN ≅ BZ Given
∠N ≅∠Z Given
ΔLNM ≅ ΔBZA Angle Side Angle congruent
The answer is 90 because 360/4 (since it is a quadrilateral) is 90 degrees