Find the lateral area for the pyramid with the equilateral base.
2 answers:
Answer:
Option A is the correct answer.
Explanation:
The given pyramid has 3 lateral triangular side as shown below.
Base of triangle = 12 unit
We need to find perpendicular.
By Pythagoras theorem we have
Perpendicular² = 10²-6²
Perpendicular = 8 unit
So area of 1 lateral triangle = 1/2 x Base x Perpendicular.
= 1/2 x 12 x 8 = 48 unit²
Area of lateral side = 3 x 48 = 144 unit²
Option A is the correct answer.
You might be interested in
Answer:
Step-by-step explanation:
Hello!
Expand the square using the Distributive Property.
<h3>Expand</h3>Distributive x - 5 to each factor
The answer is .
We can also use a special binomial product formula.
Formula:
We get the same answer both ways.