Answer:
46
Step-by-step explanation:
To solve this, add.
28 + 18 = 46
it’s 63 because the sides are equal on both sides
The answer to your question,
If rounded it would be 12.3, if not 12.5 with a repeated.
-Mabel
The formula for finding the area of an equilateral triangle is
square root of 3 * (a^2/2)
a is the side length so in this case is 6
square root of 3 * (18)
the area is about 15.6
