THE AREA OF THE AREA OFEXAMPLE 6
3. The area of The area ofExample 6: w + z 180
A
B
C
D
E
an equilateral a right triangle(since PR is a straighttriangle with with legs 3line)side 6 and 9A machine was in operationThe area of a triangle is one half the product of the lengths of thefor t minutes.base and the altitude. In Column A, the length of the altitude mustExample 7: The number 60tA
B
C
D
E
first be determined. A sketch of the triangle may be helpful.of seconds thatthe machine wasin operation6
6
h
A farmer has two plots of land3
3
that are equal in area. The first6
plot is divided into 16 parcels withThe altitude h divides the base of an equilateral triangle into twom acres in each parcel, and theequal parts. From the Pythagorean Theorem, h2
+ 32
= 62
, orsecond plot is divided into 20 par-h 33. Therefore, the area of the triangle in Column A iscels with n acres in each parcel.Example 8: m nA
B
C
D
E
1