which weighed 30 pounds. Find the percentage of the
Proportion is a statement of two ratios which are
1/3=5/15 or 1:3=5:15
Given the proportion:
by cross multiplying: a x d = b x c
If 50 sheets of galvanized iron weigh 2,313 pounds, how
much will 39 sheets weigh?
Let W = weight of 39 sheets
THE LAW OF PYTHAGORAS
The Law of Pythagoras is the square of the hy-
potenuse of a right triangle equals the sum of the
squares of the two legs. It is expressed by the formula
a2 + b2 = c2.
RIGHT TRIANGLE triangle having one
HYPOTENUSE The hypotenuse of a right
triangle is the side opposite the right angle.
LEG The leg of a right triangle is a side
opposite an acute angle of a right triangle.
A ABC is a right triangle.
L C is a right angle.
c is side opposite L C and is the hypotenuse.
a is side opposite L A and is a leg.
b is side opposite L B and is a leg.
According to the Law of Pythagoras:
a2 + b2 = c2
or by subtracting b2 from both sides
a2 = c2 b2
or by subtracting a2 from both sides
b2 = c2 a2