Answer:
84
Step-by-step explanation:
4 * 2 = 8
8+4 = 12
Answer:
x = ± 15
Step-by-step explanation:
Given
x² = 225 ( take the square root of both sides )
x = ±
= ± 15
That is x = - 15 0r x = 15
Yes because all equilateral triangles have equal angles and side lengths so they are all similar. hope i helped -J