In an equilateral triangle all the sides are equal. This means that all the angles add up to 180 degrees.
Divide 180 by 3 and you get 60.
You want an exterior angle so you cut the angle in half ( it is now 30 )
Because the base and the line are parallel (form right angle if drew line connecting them) x is equal to
90-30=60
Answer:
a
Step-by-step explanation:
51edf + (5) is 100 so its 300
Answer:
Its (A), 1/9a^2
if you work out all of the other options it does not equal to the expression (3a)^-2
Step-by-step explanation:
