Remember, the sides are labelled with lower case letters, and angles are labelled with CAPITAL letters. The angles are labelled with the CAPITAL letter that is opposite from the side with that letter.
so:
Angle A is opposite side a
Angle B is opposite side b
Angle C is opposite side c
Answer:90 inches
Step-by-step explanation:
The answer would be 
In 1.23, we know that 1 is a whole number and .23 is part of a whole, so it is a fraction.
.23 can be written as 
because the decimal is till the hundredths place.
We cannot simplify any further so we leave it as is.
The answer would then be .
Just use the formula 1/2bh
Answer: 3 different ways
Those three ways, I'll label as A, B, and C
A) Buying the 78 cookies one at a time
B) Buying 6 packs of the 13-count cookies, so 13*6 = 78 cookies total.
C) Buying 2 packs of the 39-count cookies, so 2*39 = 78 cookies total
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For option A, we can imagine a rectangle that is 1 unit high and 78 units long giving an area of 1*78 = 78. Or we can imagine a single row of 78 cookies in this row.
In option B, we can have a rectangle that is 13 by 6, giving an area of 78. Or We could have 6 rows of 13 cookies per row (each row representing a package of cookies).
Option C would be similar to B, instead there would be 2 rows of 39 cookies per row.
