Answer:
x = 2
Step-by-step explanation:
Since the triangles are similar then corresponding sides are in proportion, that is
= 
, substitute values
= 
( cross- multiply )
7x² = 28 ( divide both sides by 7 )
x² = 4 ( take square root of both sides )
x = 
= 2
Answer:
A
Step-by-step explanation:
We are told that the number at the unit place is 3 less than the number at the tens place.
So if the number at the units place is b, then the number at the tens place is 10(b+ 3)
So the number is thus;
10(b + 3) + b
= 10b + 30 + b = 11b + 30
The triangle Sum Theorem says that the sum of all the angles in a triangle has to equal 180 degrees. Since all three sides (and, consequently, angles) in an equilateral triangle are the same, you can divide 180 by 3 to find the measure of any angle of an equilateral triangle (60 degrees).
I think it is 77% or 77.7`% ,but tell me if I'm wrong
